15 Minute Series What is a computer virus?


In Summary:

A computer virus is an executable program that is able to replicate itself. Each virus contains instructions to initiate a unique, problematic event on the infected computer. The effects of these events can range from annoying to potentially devastating.

A common type of virus is a file virus, which attaches itself to an existing program. When the program is run, the virus is also executed. Internet users can unknowingly download a software program that contains a virus.

Other virus types include boot sector viruses and Trojan Horse programs which some experts do not classify as true viruses. Anti-virus tools can help a user to detect and eradicate viruses before they have an effect on an infected computer.



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