You surely have some idea how a computer virus works, though you may not know the details. Somehow it weasels its way into your computer, and then the computer slows way down…or it starts making ...

What Is a Computer Virus? A computer virus is a program. Like other programs, it’s defined by what it does, and the big thing a virus does is replicate itself.

What Is a Computer Virus? A computer virus is a program. Like other programs, it’s defined by what it does, and the big thing a virus does is replicate itself.