what are computer viruses?

Question

what damages they can do to system,
how tjey spread

Answer 1

A virus by definition is anything that replicates itself. A computer virus is a program or pseudo program that copies itsef over and over again once activated in your system and can do any number of things. It can send out repeat messages and/or emails from your computer based on address lists that are stored on your computer or just keep building itself within your system and crowding out or overwriting other data in your system. Nasty buggers they are.....

Answer 2

There are five kinds of virus found in computers. They are-
1.Programme virus
2. Boot Virus
3.Multiple Virus
4. Stealth Virus
5.Macro Virus
It is capable of damaging the data stored on the disk by attacking and infecting the files already saved. It can also lie silently on the hard disk for moths together and the data and programmes erased.Virus spread and damage the data stored.By using a floppy disk in an infected system and then using the same disk on a healthy system the virus spreads.

Answer 3

Computer viruses are malicious programs that can harm your computer. They are spread through emails and people sending them files over the web using sites like rapidshare, warez, crack sites, even **** sites have lods of viruses and it's varient trojans. You'll know you have a virus if your computer slows down, stops responding, and restarts every few minutes. To help protect your computer you need to download an antivirus program and keep it up to date. Some free programs are AVG, Anti-Vir, Avast, and Bitdefender. AVG and Avast are the 2 best free ones. Bitdefender used over 100mb of ram on my computer even when it wasn't scanning my computer so personally I don't reccomend it. My personal fav is Nod32, (though not free) When set to typical install, it scans files in the background (no more scanning computer's once a week), and will scan email attatchments and internet files b4 they are downloaded to your computer. Eset Nod32 offers a 30day trial at http://eset.com. If you don't want to pay for antivirus programs, use AVG or avast. Also contact your ISP and see if they have a suite that you can use. ISP's offer antivirus/antispyware programs for free for using their service. Best of Luck and Be safe out there...

Answer 4

To give u a good example Viruses are created or should I say programmed as infectors which destroy and eat up all the files and folders in computers which have these in them.
There are thousands of types of viruses and still growing.
Its created by experted computer programmers who wants to spoil other computer files.
Viruses are mostly found in Windows Xp PC's and are formed by files downloaded into the computer which are infected by these Viruses.
Viruses aren't like the ones which form in our body, but the more infected files u have in u'r computer the more it will spread and spoil u'r whole computer.

Answer 5

Computer viruses are basically programs that can hamper the normal functioning of your computer. Computer viruses is a very huge subject in itself. better go through some technical website like www.howstuffworks.com to know more details

Answer 6

com. viruses are computer based programms.they can format yr hard disc or even lock it.u can loss all ur data.they spread over internet or email.most likely spys and viruses spread by **** sites and smiley and screensaver or pop ups

Answer 7

computer virus
n.
A computer program that is designed to replicate itself by copying itself into the other programs stored in a computer. It may be benign or have a negative effect, such as causing a program to operate incorrectly or corrupting a computer's memory.

Answer 8

like there are programs to make computer perform a function, viruses are programs use to destroy certain features or functions of your computer.

Answer 9

http://en.wikipedia.org/wiki/Computer_virus

This article is the best and has the most rich info on the net.
It also has links to more articles.
It is sure to be the best answer you will get.

Answer 10

the damages they can do to your system are make it crash, make you lose your files, and a lot of other stuff.
they are things that have been sent and are supposed to destroy your files and make your computer crash.