COMPUTER WORMS
Worms are unable to replicate within a computer; instead, they replicate by being passed from one computer to another, either via a vulnerabilities in the system or via email. Like the computer virus, they can do a great deal of damage to a computer they infect. Except for being unable to replicate within a computer, they behave much like viruses and can be every bit as damaging.

Also like the viruses, you can only feel relatively safe if you use a current update of a good anti-virus software, and if you are very careful about what programs you download and what email attachments you open. Next