From macro viruses and boot sector viruses to droppers and packers, here’s a look at 9 common virus types, what they do, and the function they perform for attackers.

A computer virus is a form of malicious software that piggybacks onto legitimate application code in order to spread and reproduce itself.

Viruses, worms, and Trojans are three types of malicious software (malware) that can cause harm to computer systems and networks.

Macro Viruses One virus type that is perhaps one of the most violating is the macro virus. It attacks your computer by running an executory code to perform a variety of functions.

To make matters worse, infected computers are often asymptomatic and appear to be functioning normally. Many Trojan viruses don't slow your computer down or make your cursor go crazy.

Computer viruses first emerged in the 1980s. Since then, they have posed problems for computer users worldwide. Unfortunately, most are here to stay. Computer viruses are now so common that even ...