|worm||worm is a separate computer program that can replicate itself automatically over a network.
Worms are ofren, but not always, malicious and might interfere with the normal use of a computer or a program. They often exploit vulnerabilities in some automatic file sharing feature found on many computers to replicate.
Worm is different than a virus, it does not alter/infect files and its main ability is to replicate by itself. Still, a malicious worm can be programmed to delete all your files just as well.