What is a virus?
virus is a program that loads itself onto your computer and executes
instructions that can damage your files and even delete them. Viruses
can use up your computer's memory, can prevent it from booting, and will
spread to other computers via diskette. Nasty cousins of viruses are
worms and Trojans. Worms are viruses that spread over networks and the
Internet, often by hiding within e-mail attachments or already infected
network directories. They can quickly replicate by exploiting commonly
used programs such as e-mail address books. Trojans infect your computer
by hiding inside otherwise innocuous programs such as games, or they can
arrive via e-mail. While they don't replicate as worms and viruses do,
they can be just as destructive as viruses.
Other Anti-Virus and Security References