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Seven Various Types of Computer Virus

A virus is considered to be a mischievous program that propagates by infiltrating another program, copying itself to a computer's document, and modifying the way the computer works. Viruses usually spread from system to system after a user opens an infected file or program. They use one of three methods to replicate and spread: attaching themselves to a legitimate program file, infecting the boot process, or infecting user documents. People may unknowingly spread the virus by using infected computers or, sometimes, intentionally.
A virus can...