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A computer virus is a program of piece of code that loads onto a computer without the user's knowledge and runs against their wishes.

en.wikipedia.org/wiki/Computer_virus

A computer virus is a type of malicious software program ("malware") that, when executed, replicates itself by modifying other computer programs and inserting ...

us.norton.com/internetsecurity-malware-what-is-a-computer-virus.html

A computer virus, much like a flu virus, is designed to spread from host to host and has the ability to replicate itself. Similarly, in the same way that viruses cannot ...

www.webroot.com/us/en/home/resources/articles/pc-security/computer-security-threats-computer-viruses

Designed to relentlessly replicate, computer viruses infect your programs and files, alter the way your computer operates or stop it from working altogether.

www.brainpop.com/technology/computerscience/computerviruses

In this educational animated movie about Technology learn about emails, attachments, scans, worms, and networks.

www.microsoft.com/en-us/safety/pc-security/virus-whatis.aspx

Learn about computer viruses, including what a virus is, how viruses are spread, and how to help prevent viruses on your own computer with information from ...

computer.howstuffworks.com/virus.htm

Strange as it may sound, the computer virus is something of an Information Age marvel. On one hand, viruses show us how vulnerable we are -- a properly ...

www.webopedia.com/TERM/V/virus.html

A computer virus is a program or piece of code that is loaded onto your computer without your knowledge and runs against your wishes.

www.smithsonianmag.com/science-nature/top-ten-most-destructive-computer-viruses-159542266

Mar 19, 2012 ... Computer viruses have come a long way from the early days of personal computers, when teenage hackers competed for bragging rights, ...

www.hongkiat.com/blog/famous-malicious-computer-viruses

Getting a computer virus has happened to many users in some fashion or another. To most, it is simply a mild inconvenience, requiring a cleanup and then.