Different Types of Computer Viruses

Computer virus is a software program written with malicious intentions. There are number of computer viruses that can impede the functioning of your computer system. Let us find out the different types of computer viruses.
Notorious computer viruses
Did You Know?
In 2010, Stuxnet virus targeted Siemens Industrial Software and Equipment. There are allegations that this virus is a part of a U.S. and Israeli intelligence operation named "Operation Olympic Games" and it hit Iran's nuclear plant Natanz.

Computer virus is a harmful software program written intentionally to enter a computer without the user's permission or knowledge. It has the ability to replicate itself, thus continuing to spread. Some viruses do little but replicate, while others can cause severe harm or adversely affect the program and performance of the system. A virus should never be assumed harmless and left on a system.

There are different types of viruses which can be classified according to their origin, techniques, types of files they infect, where they hide, the kind of damage they cause, the type of operating system, or platform they attack. Let us have a look at few of them.

Memory Resident Virus

These viruses fix themselves in the computer memory and get activated whenever the OS runs and infects all the files that are then opened.
  • Hideout: This type of virus hides in the RAM and stays there even after the malicious code is executed. It gets control over the system memory and allocate memory blocks through which it runs its own code, and executes the code when any function is executed.
  • Target: It can corrupt files and programs that are opened, closed, copied, renamed, etc.
  • Examples: Randex, CMJ, Meve, and MrKlunky
  • Protection: Install an antivirus program.
Direct Action Viruses

The main purpose of this virus is to replicate and take action when it is executed. When a specific condition is met, the virus will go into action and infect files in the directory or folder that are specified in the AUTOEXEC.BAT file path. This batch file is always located in the root directory of the hard disk and carries out certain operations when the computer is booted.

FindFirst/FindNext technique is used where the code selects a few files as its victims. It also infects the external devices like pen drives or hard disks by copying itself on them.
  • Hideout: The viruses keep changing their location into new files whenever the code is executed, but are generally found in the hard disk's root directory.
  • Target: It can corrupt files. Basically, it is a file-infecter virus.
  • Examples: Vienna virus
  • Protection: Install an antivirus scanner. However, this type of virus has minimal effect on the computer's performance.
Overwrite Viruses

A virus of this kind is characterized by the fact that it deletes the information contained in the files that it infects, rendering them partially or totally useless once they have been infected.
  • Hideout: The virus replaces the file content. However, it does not change the file size.
  • Examples: Way, Trj.Reboot, Trivial.88.D
  • Protection: The only way to clean a file infected by an overwrite virus is to delete the file completely, thus losing the original content.
However, it is very easy to detect this type of virus, as the original program becomes useless.

Boot Sector Virus

This type of virus affects the boot sector of a hard disk. This is a crucial part of the disk, in which information of the disk itself is stored along with a program that makes it possible to boot (start) the computer from the disk. This type of virus is also called Master Boot Sector Virus or Master Boot Record Virus.
  • Hideout: It hides in the memory until DOS accesses the floppy disk, and whichever boot data is accessed, the virus infects it.
  • Examples: Polyboot.B, AntiEXE
  • Protection: The best way of avoiding boot sector viruses is to ensure that floppy disks are write-protected. Also, never start your computer with an unknown floppy disk in the disk drive.
Macro Virus

Macro viruses infect files that are created using certain applications or programs that contain macros, like .doc, .xls, .pps, .mdb, etc. These mini-programs make it possible to automate series of operations so that they are performed as a single action, thereby saving the user from having to carry them out one by one. These viruses automatically infect the file that contains macros, and also infects the templates and documents that the file contains. It is referred to as a type of e-mail virus.
  • Hideout: These hide in documents that are shared via e-mail or networks.
  • Examples: Relax, Melissa.A, Bablas, O97M/Y2K
  • Protection: The best protection technique is to avoid opening e-mails from unknown senders. Also, disabling macros can help to protect your useful data.
Directory Virus

Directory viruses (also called Cluster Virus/File System Virus) infect the directory of your computer by changing the path that indicates the location of a file. When you execute a program file with an extension .EXE or .COM that has been infected by a virus, you are unknowingly running the virus program, while the original file and program is previously moved by the virus. Once infected, it becomes impossible to locate the original files.
  • Hideout: It is usually located in only one location of the disk, but infects the entire program in the directory.
  • Examples: Dir-2 virus
  • Protection: All you can do is, reinstall all the files from the backup that are infected after formatting the disk.
Polymorphic Virus

Polymorphic viruses encrypt or encode themselves in a different way (using different algorithms and encryption keys) every time they infect a system. This makes it impossible for antivirus software to find them using string or signature searches (because they are different in each encryption). The virus then goes on to create a large number of copies.
  • Examples: Elkern, Marburg, Satan Bug and Tuareg
  • Protection: Install a high-end antivirus as the normal ones are incapable of detecting this type of virus.
Companion Viruses

Companion viruses can be considered as a type of file infector virus, like resident or direct action types. They are known as companion viruses because once they get into the system they 'accompany' the other files that already exist. In other words, to carry out their infection routines, companion viruses can wait in memory until a program is run (resident virus), or act immediately by making copies of themselves (direct action virus).
  • Hideout: These generally use the same filename and create a different extension of it. For example: If there is a file "Me.exe", the virus creates another file named "Me.com" and hides in the new file. When the system calls the filename "Me", the ".com" file gets executed (as ".com" has higher priority than ".exe"), thus infecting the system.
  • Examples: Stator, Asimov.1539 and Terrax.1069
  • Protection: Install an antivirus scanner and also download Firewall.
FAT Virus

The file allocation table (FAT) is the part of a disk used to store all the information about the location of files, available space, unusable space, etc.
  • Hideout: FAT virus attacks the FAT section and may damage crucial information. It can be especially dangerous as it prevents access to certain sections of the disk where important files are stored. Damage caused can result in loss of information from individual files or even entire directories.
  • Examples: Link Virus
  • Protection: Before the virus attacks all the files on the computer, locate all the files that are actually needed on the hard drive, and then delete the ones that are not needed. They may be files created by viruses.
Multipartite Virus

These viruses spread in multiple ways possible. It may vary in its action depending upon the operating system installed and the presence of certain files.
  • Hideout: In the initial phase, these viruses tend to hide in the memory as the resident viruses do; then they infect the hard disk.
  • Examples: Invader, Flip and Tequila
  • Protection: You need to clean the boot sector and also the disk to get rid of the virus, and then reload all the data in it. However, ensure that the data is clean.
Web Scripting Virus

Many web pages include complex codes in order to create an interesting and interactive content. This code is often exploited to bring about certain undesirable actions.
  • Hideout: The main sources of web scripting viruses are the web browsers or infected web pages.
  • Examples: JS.Fortnight is a virus that spreads through malicious e-mails.
  • Protection: Install the microsoft tool application that is a default feature in Windows 2000, Windows 7 and Vista. Scan the computer with this application.

A worm is a program very similar to a virus; it has the ability to self-replicate and can lead to negative effects on your system. But they can be detected and eliminated by an antivirus software.
  • Hideout: These generally spread through e-mails and networks. They do not infect files or damage them, but they replicate so fast that the entire network may collapse.
  • Examples: PSWBugbear.B, Lovgate.F, Trile.C, Sobig.D, Mapson
  • Protection: Install an updated version of antivirus.

Another unsavory breed of malicious code are Trojans or Trojan horses, which unlike viruses, do not reproduce by infecting other files, nor do they self-replicate like worms. In fact, it is a program which disguises itself as a useful program or application.

▶ Beware of the fact that these viruses copy files in your computer (when their carrier program is executed) that can damage your data, and even delete it. The attacker can also program the trojans in such a manner that the information in your computer is accessible to them.

Logic Bombs

They are not considered viruses because they do not replicate. They are not even programs in their own right, but rather camouflaged segments of other programs. They are only executed when a certain predefined condition is met. Their objective is to destroy data on the computer once certain conditions have been met. Logic bombs go undetected until launched, the results can be destructive, and your entire data can be deleted!

Viruses Affecting Palm OS

The initial launch of Palm OS in 1996 and then the stable release in 2007 made way for attackers to write new malicious codes. The viruses known till date that affect this type of OS are:
  1. "Liberty" Crack: It is a Trojan horse that deletes all your files and applications from your PDA.
  2. PEMagic: It allegedly deletes the ROM.
  3. Phage: It deletes your files.
  4. Vapor: It deletes your files.
With all said and done, there is no real threat to your PDAs as regards to virus attacks. There is still no evidence showing the amount of damage these viruses can cause.

Viruses Affecting Symbian OS

Symbian OS also has no proven virus threats. The only virus that is said to affect the smartphones is the Cabir virus. However, this virus runs in the background and drains the battery power. The fact that these viruses spread via Bluetooth has also proven to be a myth.

This year, too, there have been virus attacks that have threatened to delete our files and applications. Here's a look at them:

2012's Worst Viruses

! Flame: It is said to be the first of its kind that uses Bluetooth as the spread medium. It was first detected in a Russian lab.

! Belgian Computer Crime Virus: This virus spread globally and asked the users for some vital information and a processing fee, claiming that it was for police records.

! Shamoon: This virus is dangerous as it creates files of the data on your hard disk, and then this compiled data is sent to the attacker.

Besides, there are many other computer viruses that have a potential to infect your digital data. Hence, it is a must that you protect your data by installing a genuine quality antivirus software.
Last Updated: October 16, 2012
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the type of virus:
1)command processor infection (2)boot sector infection(3)executable file infection (4)file-specification infection (5)memory resident infection
All this are not mention here
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Thanks for sharing a virus knowledge. :) - kepisal [June 5, 2011]
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i got a virus that keeps redirecting me on diffrent ad websites and no mater what i do it keeps redirecting also i keep hearing random recordings and songs that i cnt see nor did i command it to do and it shuts y computer down and it shuts down my explorer program when its still there just now it did it at 8:58AM what do i do please help - lavastorm [May 25, 2011]
how do i protect my personal computer from computer virus? - ringimawa [May 25, 2011]
Nice Details for Viruses. - Chester [May 24, 2011]
I have learnt a lot - Sharon [May 22, 2011]
Viruses are quite increadable, but they are good so that they can make a charlleng in the lifes of expects of computers. Because with viruses I can say that they aint no master of the computer - Hlomisi Skosana [May 14, 2011]
Thank you, this is very helpful for my assignment. - Fox [May 9, 2011]
thanks for the data
so great job
- priyadarsini [May 4, 2011]
Very helpful source. - sushichef [May 2, 2011]
Great job! - Bob [April 28, 2011]
VERY NICE - SHUBHAM [April 20, 2011]
good - owajionyi [April 15, 2011]
this is very useful
thanks a lot! (:
- Anonymous [April 12, 2011]
excellent - vikas [April 8, 2011]
thank u for magnificent work in providing us with data - kibuuka elly [April 7, 2011]
thanks - 12 [April 6, 2011]
It's really wonderful,keep it up - Ama B [March 24, 2011]
i think the intention was to gernarate money because many people buy antiviruses.and i hope it contributes to the GDP - Kwazi Nlangisa [March 24, 2011]
more virus please! - karllitoz [March 23, 2011]
cool things i love computer thanx for the internet - george slavia [March 23, 2011]
how each of these types works on a computer - lindelani [March 22, 2011]
very informative - vivek [March 19, 2011]
Nice - USman [March 19, 2011]
lol add me on facebook 'Danny Partick maher' - Danny Maher FB [March 15, 2011]
very nice - Danny Maher [March 15, 2011]
ADATA UFD - Njabulo [March 14, 2011]
Not what I was looking for! - Chenelle D [March 12, 2011]
it help me at a homework very much - priteshpancholi [March 9, 2011]
all sutioesion is well - pritesh panchol [March 9, 2011]
it help to my homework thank you very much!... - trishia [February 28, 2011]
nice.but various fields used shold be given - sasikiran [February 27, 2011]
with your knowledge on computer i think you guys are doing a great job by helping us achieve the same knowledge - chizoba joseph [February 26, 2011]
i didn't understand anything about ur explaination! - KL RIDERS [February 24, 2011]
i enjoy the fat virus THE NAME HAHAHAHAHHA - daniel [February 23, 2011]
nice - seun [February 21, 2011]
nice full of details but u can add more - oyegoke temi [February 21, 2011]
kilo - ay [February 17, 2011]
i say thanks - Paul odhiambo [February 16, 2011]
make it brief to some extent.
since this become phrases.
- Ahmedziyad [February 16, 2011]
WHAT ARE THe kinds of virus - mitch [February 14, 2011]
hai im loking for a job pls. can apply in your company... - mr Darlo [February 14, 2011]
thank you very much... - lucelyn G [February 9, 2011]
Oh! it is so great it help me to know more about computer viruses! Thanks! - Michael Perez [February 9, 2011]
informative - jonam [February 7, 2011]
excellent data aviability - devarshi [February 5, 2011]
superb infor., - Vijay [February 4, 2011]
MORE VIRUSES! - SMILE [January 29, 2011]
THeE bOOt SeCtiON WAS funny BoOTaBle! - joe brown [January 28, 2011]
nice job - nhoj evad [January 26, 2011]
so beautiful,so beautiful it's true... - john vincent [January 25, 2011]
virus is a malicious software - rakesh [January 25, 2011]
tnx! - nodretsa [January 24, 2011]
can a computer virus be corrected - comfort [January 21, 2011]
Extremely excellent and well elaborated - Alex Y Mshelia [January 20, 2011]
wow,, a credible information i met. Thank you for this,, - elf-killer [January 20, 2011]
theseare just the correct answers - kufdakwashe [January 19, 2011]
which the best type of computer - jhasmine [January 19, 2011]
good website - joe s [January 14, 2011]
very good - castory n [January 14, 2011]
This is very imporatat

and thanks for this info
- Dinesh [January 11, 2011]
give the history of all viruses. - sangavi s [January 11, 2011]
viruses details is super.but it need more images about viruses - kavichithra [January 10, 2011]
i hate viruses
- ronel [January 4, 2011]
thanx it helped a lot in my project ... - atreyee [January 3, 2011]
cool - kannan [January 2, 2011]
ok - ok [December 12, 2010]
Its really an useful information... - SureshMythily [December 12, 2010]
bad kayo ! bad yan ha ! - edmily03 [December 6, 2010]
meron pang ibng viruses mga 15 lng pwede! - angel [December 6, 2010]
great - meghana [December 5, 2010]
this is an excellent result even a school child could understand the meaning of all words .keep up the good work - precious [November 29, 2010]
how is affect to computer ? - pankajkumar [November 28, 2010]
Please we need full details of virus - Ajayi bamidele [November 25, 2010]
Not bad ! - Dennis S [November 25, 2010]
viruses are virus - chinky [November 25, 2010]
I have a virus that was embedded in an email. it sends spam messages to everyone on my contact list. What is this called and how can i find and eliminate it? I am operating on OS X - Joe McGill [November 22, 2010]
i hate viruses,
they are playing hide and seek with me.
- williams Gyimah [November 18, 2010]
good - baijudivakar [November 15, 2010]
THANX FOR THE INFORMATION - GS [November 14, 2010]
good - lOVELY DEN [November 10, 2010]
There is also a type of virus called wormsies - okay [November 9, 2010]
good - jayne [November 9, 2010]
are there newer viruses including for the Macintosh - mike [November 3, 2010]
very well and good information given above... this so much help me in making my project on cyber crime... n hacking.. - heart hacker [November 3, 2010]
is it true - nagaraj savant [November 1, 2010]
antivirus programs have improved - johnbrebeuf [October 20, 2010]
helpful not - john fawcett [October 15, 2010]
nice well not comments but compliment nice virus article - isabella [October 14, 2010]
correct - susan [October 13, 2010]
more type of computer virus - henry [October 12, 2010]
i want important information - deepika [October 11, 2010]
It is a fantastic notes for computer education student. - Md.Sameer Ahmed [October 11, 2010]
thank u sir . i am very grateful to you - Akhil [October 9, 2010]
it was very helpful - dan [October 8, 2010]
gud information - aditya [October 8, 2010]
how can a computer has a virus - felix [October 6, 2010]
there are some types of virus are missing - jit [October 6, 2010]
good job i loved your information - pebbles m [October 5, 2010]
nice! helps us know what the virus is! - Yam-Yam [October 4, 2010]
this is really a big help!...thanks!.. - Iveon [October 4, 2010]
amazing! - telerese [October 4, 2010]
thanks so much for creating and giving us much information about stuff in computers! - Ettenim S. [October 4, 2010]
this site is great - yoyo [October 4, 2010]
hi this is collins and i thank you for the answers u gave me during that time - collins brown [October 2, 2010]
yah good - neeru [September 30, 2010]
these viruses are kool lol :) - im watching you [September 23, 2010]
it is very informative and its very nice - sneha [September 21, 2010]
ITS GREAT! - ANTO [September 21, 2010]
how can i know the virus - amit prajapati [September 20, 2010]
v.good - deepak [September 18, 2010]
fine - sasi [September 17, 2010]
its very elaborate and fscinating to know these viruses, thier mode of operation and dangerous effects. - Jay Jay [September 16, 2010]
wow! this was a qood help for my project..thanx! - -JuaN [September 10, 2010]
ok...alright - alex [September 6, 2010]
thanks jayshree - Ganesh [August 30, 2010]
what antivirus can we use to elimminat the above mentioned virus - patrick [August 30, 2010]
virus is invented by the anti-virus companies because of the sale of anti-virus product - naresdh [August 25, 2010]
ok. Fine. - Soundar [August 24, 2010]
MORE VIRUS OK - VIDA [August 23, 2010]
iba-iba pla virus ng computer - grace [August 21, 2010]
cool guys nice informatiom learned a lot - ken aston [August 20, 2010]
how to crack the viruses - kapil [August 18, 2010]
can i have the names of some recent virus ?PLZZZZZZZZZZZ...
IN 2 DAYS... plzz..help me...
- MITALI [August 17, 2010]
Thanx for the information...
you are vary help full for me to lots of knowladge about viruses...
- ADITI [August 17, 2010]
So,why on the earth,some people excrete their time to avail us while others do the opposite?! I hope these viruses' makers be wise and stop harming us by destorying our systems and making us loose data which we spend our precious time collecting it! - Altyb Ali [August 16, 2010]
We thank you very much for these valuable information about computer viruses types. - Altyb Ali [August 16, 2010]
thanx cause it healped alot in school project - meghana [August 12, 2010]
niee! - meghana [August 12, 2010]
This information was excellent for my school project. Many thanks ! - Tony D'sa [August 3, 2010]
thanx! :) - srivatsav [August 1, 2010]
putik na yan - rey [July 21, 2010]
wala lang! - .hehe [July 15, 2010]
it's nice to know more about computer viruses - killy [July 13, 2010]
now i know the kinds of viruses - Mark Christian [July 12, 2010]
it is true the viruses are very very true - Mark Joseph [July 12, 2010]
ah ok..now i know..hehe - ligaya [July 5, 2010]
thankz fr it - raman [July 2, 2010]
yes i like all information - Shradhey [June 30, 2010]
Can you get some more photos please...information very helpful though.
Thanks to whoever wrote this. They will get the credi
- Champ [June 29, 2010]
Excellent feedback. Thak you very much. - Nagendar, Nagpu [June 28, 2010]
You can give some more information and virus - preeti [June 24, 2010]
need care and attention - oenga [June 18, 2010]
what is the possible solutions to this problems - uba [June 18, 2010]
Thank you for the lessons... - jovene luis [June 16, 2010]
HAVE TO GO NOW - jangali baba [June 16, 2010]
nice and helpful for my computer homework :) - mandira [June 16, 2010]
good information - sahil [June 12, 2010]
bad comercisla de lui sa fari l' de' du katrete mustanche laguate suis je habbite' - mandira bhatnag [June 10, 2010]
When I get on the internet and type something in google I get a list for that word until I click on one of the options. Then I am sent to a different page...or it shows a page that acts like my internet is down... Please help...I - Dee P [June 10, 2010]
gudd gudd - saanya [May 31, 2010]
very nice details - salman [May 24, 2010]
how dare did "melissa" bcome a type of virus?
btw good info!
- Melissa [May 22, 2010]
viruses that get intothe email. - Nichole [May 18, 2010]
who wrote all of this - akosheana panke [May 14, 2010]
It is very educative - bridget [May 11, 2010]
i have a very good sence about this site - boateng [May 11, 2010]
its a very good website it goes into details - Nii Kofi Akrash [May 11, 2010]
its a very good site - albert [May 11, 2010]
very good - Nii Kofi [May 11, 2010]
i think i want to format my computer - albert [May 11, 2010]
good explain - manish sanwaria [May 10, 2010]
can i have the names of some reasent virus ? - kev [May 10, 2010]
I really appreciate for the information you have provided. Im sure that it would help me a lot - Syed Arif [May 6, 2010]
how can i do this - arab s [May 5, 2010]
try spywear :( - hayden [May 2, 2010]
Among those four, what is the non virus programm?
Bugs, Droppers, Hackers, Virus impostors
- Sunila Damayant [April 26, 2010]
i need about encription techniques - srinu [April 24, 2010]
you have forgotton to say about the auto run virus - auto run [April 24, 2010]
I ment Goggle the website. - Lord Orga [April 22, 2010]
Goggle is probably a very dangerous virus. SpySherrif is a possible trojan horse. - Lord Orga [April 22, 2010]
iam introduced in computer virus - MUHAMMAD [April 21, 2010]
viruses are very harm - muhammad [April 21, 2010]
I can't actually rememebr the correct name of the virus but im geussing it's called a spamming BOT, this is generally only seen in some games, Basicly someone will join into a game server and spam 100's of 1000's of users Perhaps with the name ISEEU1 ISEEU1. ISEEU1..
It basicly spams the server to and overload status which will then crash the server or shutting down the CPU
- Jord Scott [April 20, 2010]
Is it safe to download syyware virus removers from the internet? How do you know what is safe and what is not? - Teri [April 11, 2010]
It's comprehensive for my assignment.. Good notes.. - Owode Samson [April 10, 2010]
diseases to humans is wht virus is to computer - naz kl [April 7, 2010]
GHODA VIRUS - PRIYA [April 3, 2010]
virus is a good for new engineer. - nitya [April 3, 2010]
Very helpful thanks but one thing if you can place more
solution to remove this viruses
- mokako [March 29, 2010]
this is helpful for me and school - James Rudell [March 26, 2010]
there are many types of ukown virus aswell such as key logging and ddosing. - pixel pro [March 26, 2010]
This site has helped me to write some of my Assignment. - Micheal Sunday [March 26, 2010]
a...\ - aljohn diagro [March 22, 2010]
vbs (scandal virus which you cannot open specific drive by double click, instead right click and expore in oder to open it) - Jun Andal [March 12, 2010]
why did you try to put some images of those viruses? - aika [March 11, 2010]
i need ten types of computer viruses - ravi kiran [March 10, 2010]
say the different types of viruses and their functions - ravi kiran [March 10, 2010]
types of viruses and their functions - ravi kiran [March 10, 2010]
I had a trojan on my old computer and right at this very moment my AVG is killing some worms. - Nick [March 9, 2010]
well i think this is like weird because how do you use viruses? like how do you control it e.t.c lol! but i got trogans and worms and lots of viruses system got infected! was a a little mad. - Tanpreet [March 5, 2010]
pls more - adura [March 5, 2010]
hOW TO become a partner of internet - RICO HARADA [March 4, 2010]
How to sUBMIT TO INTERNET - RICO HARADA [March 4, 2010]
you've enlightened me more on computer virus keep it up... - Udy [March 4, 2010]
computer virus is very bad to the computer system - Udy [March 4, 2010]
Name of the virous " b6990b7e0" has infected my Windows/system 32 but not appearing in your list - R. [March 4, 2010]
Very helpful. - Andrew M [March 3, 2010]
well i think this page is worst i cant find what i am looking for i need to get your feed backs after i submit this information - chesana kimlae [March 2, 2010]
how this viruses be removed in the computer? can you please explain it to all of us who are interested to know it? tnx - achi [February 25, 2010]
it help me a lot. .
- takasu [February 24, 2010]
good, quite knowlegeble. - Debshikha [February 23, 2010]
a good effort but can be improved more.! - Adeel [February 19, 2010]
its so nice! it helped me in my assignment.. - jonah [February 17, 2010]
very good - aisle [February 9, 2010]
The above analysis of the types of viruses has been very useful for me as a student of computer - Mwenesi Roy. [January 30, 2010]
please i need ten types of anti virus - son-son [January 27, 2010]
its perfect - nomawonga [January 26, 2010]
very helpfull - dell [January 24, 2010]
i don't like she move virus.. woms,, huh! - jhay [January 21, 2010]
this is for children like marco - buddah [January 17, 2010]
niiiiice - vurn [January 17, 2010]
wow thats a lot of viruses - khadz [January 16, 2010]
data is quite useful - ar up [January 11, 2010]
Yes! These viruses are very deadly and as much as possible should be guarded against. They don't show mercy went they strike. - Promise [January 9, 2010]
i think virus is like boman irani truly - sangita jadhav [January 6, 2010]
What about viruses that don't do anything - Billy Labton [January 6, 2010]
this was great info.thanks! - Carlos [December 27, 2009]
I am a GNIIT student .I want to know what types of virus can be scarched our Computer. - saumya [December 22, 2009]
You did not specify the difference between a WORM and a computer VIRUS - Agbuke D. [November 29, 2009]
my computer was infected by virus so that the control panel and desktop properties are not appiering .and a duplicate folder is creating for each folder which contains nothing ..so please kindly tell me what should i do... - surya [November 18, 2009]
not good the explainig matter is not satisfactory, and up to the date - sandeep [November 17, 2009]
this is really interesting and is really helping me out with a big project - anonymous [November 16, 2009]
it's very good site . - bikram [November 8, 2009]
Very Good Article :) Very Informative - Ash [November 5, 2009]
Hi There! - Bob M [November 4, 2009]
Thanks for your nice explanation about meaning and seveval types of computer viruses. bye! - JUVENALIS,Thoma [November 3, 2009]
i think the eliminatgion of virus should be strictly adhered - sammie [November 2, 2009]
... no I LOVE YOU virus?... - shallie [November 2, 2009]
thanks for the info - davjj [October 27, 2009]
from beggining to end not protecting my computer from viruses is absolutely a concern - i made every po [October 27, 2009]
when i learned of what i needed to know - i in no way did [October 27, 2009]
um i am a senior member of computer viruses monthly - not a senior me [October 27, 2009]
this website is very good thx for lettin me go on there x - lucy [October 22, 2009]
Is there also a freeze 'virus'- not replicating- so not really a virus, that can actually replicate sometimes, but anyway, that can freeze a computer by duplicating a pointless message, or by opening a long one? If listed already, I'm sorry, but I only skimmed the webpage. - Ed G [October 21, 2009]
HOW ARE YOU - CHIDIMMA [October 20, 2009]
brilliant! Thanks! - beth [October 20, 2009]
thax a lot...its very efficient for me... - preet [October 18, 2009]
can i print this news - jamie marielle [October 9, 2009]
this is the best explanation i ever seen , thnk you - rodney [October 8, 2009]
ithink that this web site is very good at telling you what your computer might have - cody master [October 6, 2009]
lack of further explanation - dwight [October 4, 2009]
its good info - cheese [October 2, 2009]
Cool! - Jenny [September 29, 2009]
In fact, you are for real. Thanks for these informations. - John [September 24, 2009]
thankyou for your amazin help - clayton [September 22, 2009]
i am just curious about the viruses and I do not know what is the purpose of the programmer that programmed it - francia [September 22, 2009]
woahhhhh, no way dude straight up! - trevor [September 18, 2009]
it is awesome i love frisbees! - lauren. [September 18, 2009]
it helped me with my school work! - brigdet [September 18, 2009]
it helped me with my school work :D - clive [September 18, 2009]
I would like to know what kind of a jerk would even make something like this. I wish you could find a program or a download that could prevent any of this crap from getting on your computer. - Justin [September 7, 2009]
its very informative.and a very lot helpful. - sharanya sk [September 1, 2009]
why are people bringing virus or advocating virus which distroy softwares, i even hard of latest virus, why all these, this is not good. - dennis idris [August 27, 2009]
I think this will give me an A+ Thank You Nerds - Juan [August 25, 2009]
very good site; my question was answered. - fuz 13 177 [August 24, 2009]
,..! wala naman dito ung ibang example ng mga virus - carlo [August 24, 2009]
thanks... :-) - jessy [August 22, 2009]
explain with pictures - M.SAI HARINI [August 16, 2009]
You could write more on the trojan - John F. [August 6, 2009]
my computers internet works for about 5 to 10 minitues and then i need to resart it so the internet can work again is that a virus? - Rudy [August 4, 2009]
what about spyware & adwares?
Good otherwise.
- Deepak [August 2, 2009]
tHanK yOu fOr thIsw inForMation!It cAn hElp uS fOr oUr studies especially like me,a first year high school!kEep up tHe goOd wOrK! - Tin de Sosa [August 1, 2009]
how did human have virus? - dave [July 29, 2009]
SCARY! - virus eater [July 28, 2009]
tnx foe giving d answr - cooladlai [July 26, 2009]
sino ba ang nag gawo nang virus - tricia ganda [July 25, 2009]
bakit may virus na tinatawag - tricia [July 25, 2009]
thank u! now i have my axignment. - raigor [July 24, 2009]
Direct Action Viruses
The main purpose of this virus is to replicate and take action when it is executed. When a specific condition is met, the virus will go into action and infect files in the directory or folder that it is in and in directories that are specified in the AUTOEXEC.BAT file PATH. This batch file is always located in the root directory of the hard disk and carries out certain operations when the computer is booted
- gk virus [July 23, 2009]
i love it. - melcris [July 22, 2009]
MORE INFO! - zisew gevfid [July 21, 2009]
i think u need moe info - zisew gevfid [July 20, 2009]
kim bum!love yah. - blaise1 [July 19, 2009]
Wonderful! - blaise1 [July 19, 2009]
Very...sourceful...whahahaha!ulo! - blaise1 [July 19, 2009]
...it is pretty sourceful web,,,,,,,, - blaise [July 19, 2009]
i think you have to put a lot energies to clarifier this topic - bruno [July 12, 2009]
i never knew about this! now im scared for my computer O_O

To Raffty,
Use norton internet security and norton antivirus bcuz it is good. i had a trojan once in 05 and norton came to save the day
- Michael [July 9, 2009]
i never knew about this! now im scared for my computer O_O - Michael [July 9, 2009]
you are not alone!i love you michael jackson - michael jackson [July 9, 2009]
that is very cooL - sreejith [June 21, 2009]
only this is avliable - sreejith [June 21, 2009]
impressive - louis [June 13, 2009]
It is nice design. I am very impressed by this site. - Sumit [June 11, 2009]
thank u 4 this type of information .i enjoyd it - rizwan [June 6, 2009]
thank u this info. - rizwan [June 6, 2009]
Thanks for this information - Ashish kumar [May 24, 2009]
I LOVE MELONS - lloyd sands [May 19, 2009]
Thank you so much!
This is great info
- Mustafa [May 6, 2009]
That helped alot! - Loren [April 30, 2009]
what kind of virus then is the one that makes the disk empty, but when you check the used space there is a used space? - coritha lemon [April 27, 2009]
i think that good... - an giu lee [April 8, 2009]
please differential the different between destructive viruses and non-destructive viruses? - Dominic [April 3, 2009]
add about malware ,adware..and somthing others.. - dhaval [April 2, 2009]
may i know how these viruses actually work when it come on the computer? - minakshi shukla [March 31, 2009]
is true reila odinga virus - oliver [March 26, 2009]
fantastic. i got very new knowledge about computer viruses. thanks - rakesh asati [March 26, 2009]
computer virus is the program that has been done to destroy the files. - tulu [March 24, 2009]
this site provides usefull information - sihle [March 21, 2009]
people who make viruses are those who are smart but U G L Y! - boy [March 4, 2009]
i hate viruses but helpfull article - ermm [March 4, 2009]
love yah
- yome [February 19, 2009]
what i want to know is these,how many viruses in computer and there names - GODWIN LUKA [February 19, 2009]
yotniinam pogi me - poto na mimimim [February 18, 2009]
japayuki - yao ming [February 18, 2009]
thanks for the add - peter kembao [February 18, 2009]
Hey! I'm Raffty, I want to know about anti viruses , who can help? - raffty [February 12, 2009]
hey im looking for a friend,can someone give an email add in friendster... - Dennis [February 11, 2009]
thanks for a very usefull informations it helped a lot in my studies... - Dennis [February 11, 2009]
i prevent them from internat - shafey [February 11, 2009]
i want to be a computerengineer - shafey [February 11, 2009]
do you believe in santa claus why?!.. - cerchoji. [February 9, 2009]
i think its not enough .. - sheryl [February 5, 2009]
hi? - clarisse [February 2, 2009]
we need time bomb virus - 123456789 [January 30, 2009]
This information is very informal and detailed...keep up the good work! - Susan [January 28, 2009]
HEY SEXI HOLA PAPI - MR SEY [January 28, 2009]
IAM GAI TO - MR SEY [January 28, 2009]
thanks for the information it really helped me on my research on virus - teykichiae [January 28, 2009]
this has helped me with my college work. - guess who [January 26, 2009]
the describe information are very useful. any one should better under stand about computer virus - jamil [January 20, 2009]
All this information was great. Now i know a lot more about viruse and how to protect my pc. - John [January 14, 2009]
I THINK THATS AWSOME - Quincy harper [January 13, 2009]
Wow, all the posts are from India. Anyway, thank you for the information. This really helped me on my presentation about computer virus. - Davij [January 10, 2009]
lol im 14 i love this all viruses thanks to you i have learn variety of viruses - pung kah ming [December 22, 2008]
Really i say its very usefull for me... Thankyou - Ramesh [December 19, 2008]
The information in this web was so helpful for me. Please try to include more information in it, since it will help others who are in seek of kowledge. Please try to include more exaples of viruses with their functionings. - Jai [December 17, 2008]
This is good information to know about viruses - Justin [December 11, 2008]
how can you prevent them? - maylene [December 10, 2008]
excellent info - infant [December 6, 2008]
This is a bad website to learn from because of.. well a few things really!
1. there are different kinds of Malicious Computer Program Familys (M.C.P.F)
2. OMG its called Multipartite virus not File Infectors
3. Advance Technique Evolution Code (ATEC) is the relation to Encryted code, Oligomorphic code, Polymorphic code, Metamorphic code, macroinstruction code = (macros) they are NOT SEPARATE
4. Directory Virus files are a family relation to Boot sector scripts, MBR scripts and VBR scripts.
5.worms are a part of hackingand maleware which is a relation to Privacy-invasive software and so are adware and spyware!
6. malware-associated files are mix up family relating to almost every computer virus on the f$)+ing planet.
I give the this website a 4 out of 10 for misleading information!
- Decode/XD13 [November 30, 2008]
its a nice information.i like it - silla [November 20, 2008]
i think this website is great... - adriana [November 13, 2008]
give a more details for virusis i think is snot sufficient ok - wiki ali [November 10, 2008]
Great source of info - Bob [October 15, 2008]
please add the type of the virus. i mean are this virus kind or not. thank you - vella [October 14, 2008]
is this site good for students to study from - none [October 14, 2008]
this was a very useful sight to study different types of viruses for my report thanks a ton! - none [October 14, 2008]
the technicians has to try to do something to prevant virus - andile [October 14, 2008]
It helped so im happy :) - Giulia [October 10, 2008]
very great information - stefania [October 10, 2008]
This was GREAT! one of the best sources on the web - Enuky [October 9, 2008]
is there computer viruses established or release on year 2007-2008 - Karl [October 9, 2008]
Greate... Thank you I needed this help for my class work. thank you once again. - Angie [October 7, 2008]
What is the "LATEST" virus of computer in this year 2008?, or new viruses...? - Rasheed A. Alki [October 3, 2008]
i want information about viruses and their definations - banson banson [October 2, 2008]
they should be shut down! - james [October 1, 2008]
what is a kind of virus that makes the files of your hard drive hidden and replaces a new folder that is at .exe file type - jerald [September 19, 2008]
well i guess so your right - ann [September 8, 2008]
good info - tyrone little [September 4, 2008]
you are so bright like me you got all the viruses i will alwayas idoliezed you - ErvinDelRosario [August 30, 2008]
which are the two recent viruses? - mfundo [August 26, 2008]
thanks u made my work alot easier for me the info is very useful - sugababe36 [August 24, 2008]
it nice i like it - Bhakti [August 19, 2008]
.,these informations were very useful. - lois [August 16, 2008]
yes - Eswaranandam [August 16, 2008]
You have a i-d-10-t error - Dick Gozinia [August 15, 2008]
thats is amazing - carlito [August 8, 2008]
well i want to know how to delet Polymorphic Virus ...i want to know=)...please - karina [July 28, 2008]
This really helped me out to find out what is wrong with my computer! Thanks Alot! :D - Alexis S. [July 10, 2008]
So sexy... not the auther,
the article...
- paulhammer [July 9, 2008]
whey hellow its very good - emilie [June 20, 2008]
whey hellow - emilykenshin [June 20, 2008]
it,s a nice site
but you should add more photos
- garvika b. [June 16, 2008]
Thanks Jayashree , It was a plesure to learn about the different form of virus . - Sanjay Saha [June 12, 2008]
can people make viruses - sam jonson [June 6, 2008]
thank you for providing this mutch knoladgé about viruses:-):-):-). - SrIrAj [June 2, 2008]
what are the effects of computer virusis? - jusallah [May 7, 2008]
i think this one is so cool...hey thanks for ur big brain its a gift from GOD yeah right...these are helps with my project and i need to know more about the computer virus... - Mel.V. [May 7, 2008]
bill is bill and bill is bill says bill and bill together with bill and bill on the phone with bill and bill is bill and bill is bill is bill and bill - bill is bill [April 28, 2008]
I think that this was a useful website for the project i was doing - Bill [April 28, 2008]
i like the article. Send it to me. - michael [April 17, 2008]
this is good info - anthone [April 10, 2008]
more info. please - lilo [April 10, 2008]
Thank you much for the classification of computer viruses. Vinaka - Fe'ofa'aki [April 9, 2008]
i think that your page helped me out. but you need more and its com ing from a pro and if you got a problem with it i stay in lithonia ga, 2615, chrekeyvalley. the blue red and tan house. and you is ugly - brandly [April 2, 2008]
These are very significant information for computer science students. And I really appreciate that because you like to share your Knowledge for us. Thankyou!!! - MIILLION TEKLE [April 2, 2008]
Great Job - Tajae Mills [April 1, 2008]
thanx it helps me increasing my knowedge & my presentation - indrajeet [March 11, 2008]
hello jayasree,

i am rao, ur article is gud yaar..can i have ur mail id.......???
- rao [March 7, 2008]
VERY WELL DONE - AYUSH [March 7, 2008]
war wit u - boobes [March 6, 2008]
i think its very good n it has a clear understandin' - richelleann [March 6, 2008]
Bahaa get of this PC NOW - Bahaa's Dad [March 6, 2008]
bahaa. we love you bahaa. we do - jamie taylor [March 6, 2008]
i love only men and i wanna do stuff to them - dr bahaa [March 6, 2008]
hey guys - jamie [March 6, 2008]
im a gai and i like men - bahaa [March 6, 2008]
Hello England! - bahaa [March 6, 2008]

- RaoKN [March 6, 2008]

it is good brief to know about different vcomputer viruses.

- RaoKN [March 6, 2008]
very good information - apoorva [March 5, 2008]
i am a cheating lol i love you jamie XX - bahaa [March 4, 2008]
No you shut up. - Helen Weare [March 4, 2008]
Kevin IM CHEATING on my test .... LOOK! - Bahaa baroud [March 4, 2008]
hush ur gums helen - kev [March 4, 2008]
No i mean chris :O - bahaa baroud [March 4, 2008]
jamie is a hobo, smelly lil tramp lol - bahaa baroud [March 4, 2008]
Kevin? Chris? Oh No - Bahaa baroud [March 4, 2008]
Very Very Good - James Moffatt [March 4, 2008]
Oh my goodnes no! Shut up kevin. Iam telling Jo - Bahaa Baroud [March 4, 2008]
jamie taylor and bahha baroud are bum buddys :D:D:D screw u taylor!! - Kev [March 4, 2008]
:O I want more .... Hello Bahaa - Kevin Smith [March 4, 2008]
it's helpfull for dummies - dale [February 28, 2008]
I love the way you give the name of the viruses and the info. on them
- Camera Dennis [February 26, 2008]
♥ i really really like it♥
- mrsz.ckarter* [February 25, 2008]
i really like this article because i can learn alot of things - kim [February 25, 2008]
...very informative! - kahlaivz [February 22, 2008]
classificatin of viruses - jun [February 21, 2008]
i still like pie - i stil hate pie [February 19, 2008]
thanks for that good infromation it help me a lot - sweety [February 13, 2008]
Wow we really need ot watch out for our computers! - jenny [February 13, 2008]
Damn girl you ugly - Johnny Robinson [February 7, 2008]
I Am The VIRUS! - Hacker [February 7, 2008]
Nonsense... - Eviol reigns! [February 7, 2008]
A nice and helpful topic for IT students - Arabinda SAikia [February 7, 2008]
needs more....not much....didnt take anything from here.....to plane.....sry about that!!! - sanjana [February 3, 2008]
thanx for this help
- bhumi [February 1, 2008]
hello! I'm back just a couple of minutes(trisha F)...uhhm...is there really a FALSE VIRUS?...I'm gonna melt in front of this computer finding for that kind of virus! grrrr!!! ...oh,nothing... thanks again... - last_judgement [January 29, 2008]
hello!...thanks for the informations you've given.It helped us a lot on our research!...It's just that we could not find what is a FALSE VIRUS(if i'm not mistaken).Hope you could help us(again)...thanks!!! - Trisha F. [January 29, 2008]
may we just ask if there is a false virus?
- rorefir [January 29, 2008]
it gives very good info good job - jovi [January 25, 2008]
just joking!! this article is very useful to me!!!
bye the way im just a 2nd year student in RSHS region IX.....^-^
- mad scientists [January 25, 2008]
nothing !!!! hehehe Im a computer programer and i will put viruses around thy world!! hahaha - mad scientist [January 25, 2008]
This Is A God Article.And This Girl Is Very Beautifull - Someone [January 22, 2008]
This information is useful yo me. - Mohitesh [January 16, 2008]
- PETE [November 28, 2007]
Very good - Bahaa Baroud [November 22, 2007]
Thanks for the homework tips - MR.QWERTYUIOP [November 21, 2007]
Thank you
you have helped me with my homework
- mani [November 21, 2007]
if you have any resources then pls forward it to me.... at
thousifsmd [at] yahoo.co.in
if some one here in this blog has the approaches then pls help me...
- Thousif [November 18, 2007]
good work, thanks for providing info abt the viruses.. can you pls give some more info abt the detecting and removal of viruses... the techniques... mostly resources.... - Thousif [November 18, 2007]
hey how are you i am fine. and i love this! i had a test and we got to get on the internet and look for the answers and i found all of them here...thanx so much i love this you are just too good♥ - John Boii [November 12, 2007]
i want to know the names of computers virus - suleiman [November 7, 2007]
can you explain how long does a specific virus take to go in full effect when certain conditions is met - anlo [November 2, 2007]
hi jaya mam it's really nice.Very very useful for my not only studies but also to develop knowledge in various fields which you mentioned. - S. Kameshwaran [October 26, 2007]
all truer - unknown [October 23, 2007]
It was pretty good BUT I think it should explain moreof what it does to the computer, like the affect it has on software and hardware - jolly [October 19, 2007]
Exellent materials, very useful.Thanks alot - Emmanuel [October 16, 2007]
it is a good article - lisa [October 12, 2007]
♥this is a good article... thank you very much you got me a good grade on my project... i needed it!!! ♥ THANX VERY MUCH - cassie [October 11, 2007]
eyes likes this articles! - Unknown [October 10, 2007]
thank u got me and grade on my project on viruses work sheet..thank♥
- ciara [October 8, 2007]
virus is a non-sense and none of your business so get up on your sit and join barkadamen coz u'll fyn happiness in here. - marihuana [September 26, 2007]
excellent - rockstar [September 26, 2007]
i think this informaions are very relevant. It helps the researcher to get a clear understanding on this particular subject matter - Ishmail Kamara [September 21, 2007]
hi,your so pretty I wonder if you could help me on my project - bryan johnson [August 29, 2007]
tnx!!...i really want to know abt cmp. viruses - paulene mae [August 17, 2007]
God!!, your answers are just right!!!..........Because sometimes when I "reseach" in our computer, the answers are....ummm..what do you call that...?...in tagalog ummmm...........malayo sa assignment or project ko! - Paulene Mae [August 17, 2007]
THANK YOU A LOT for this info. I do want to know more about the different types of computer virus. - havi [August 13, 2007]
i want to know more about the different types of computere viruses - mayet [August 7, 2007]
cool - suraj [June 13, 2007]
Thank you alot for this info. it is very useful - Thank you [May 14, 2007]