Malware

The term "malware" is short for malicious software and is usually used as a catch-all term to refer to any software that causes damage to a computer, server, or computer network. Some of the most common types of malware are listed below.

Viruses
Self-replicating malware requiring a host file that depends on human action to spread it

Worm
Self-contained malware, needing no host file, that spreads automatically through networks

Trojan horses
An apparently useful and innocent application containing a hidden malicious program

Spyware
A program that secretly monitors your online activity and sends the data back to the programmer

Rootkit
A malicious program that hides itself by convincing the operating system that it isn't there

 Antivirus Ware provides independent reviews of the best-known antivirus software products available for consumer use. In addition, their Avoiding Viruses and More page provides several easy tips on keeping malware off your computer in the first place.