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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.latimes.com/world/la-fg-global-computer-virus-20170513-story.html

May 13, 2017 ... A crippling computer virus that invaded computer systems around the globe triggered a wave of aftershocks Saturday, holding data hostage on ...

www.brainpop.com/technology/computerscience/computerviruses

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

www.ask.com/youtube?q=Computer+Viruses&v=bfZ-hcEEeVM
Oct 16, 2016 ... If you've ever been victim to any destructive and dangerous computer viruses then you know how much they suck. Causing billions of dollars of ...

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.

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 ...