Malware, indicating malicious content, includes viruses, spyware, Trojan horses, or any other software designed to infiltrate or damage a computer system, steal personal information, and commit fraud.
There are several easy ways you can minimize malware risk:
Viruses are harmful programs transmitted in numerous ways. Although they differ, they're designed to spread themselves from one computer to another through the Internet and cause havoc. Most commonly, they give the criminals access to infected machines.
The terms spyware and adware apply to several different technologies. Two important things to know about them are:
A Trojan horse is a harmful code contained inside what would otherwise be harmless programming or data. The horse takes control and does its chosen form of damage, such as ruining the file allocation table on your hard disk. In one celebrated case, the Trojan was a program that was supposed to find and destroy computer viruses.