Malware is today’s number one security threat on a personal computer. The term malware is sometimes used interchangeably with the broad definition of computer viruses. Malware is malicious software such as Trojans, worms, rootkits, spyware, unauthorized adware, and true viruses. Malware programs tend to feed off each other by design.
A Trojan hides by disguising itself as a system file and often downloads other malware.
A worm continually changes form. Worms make copies of themselves using random names and generally mutate during and after a system reboot.
Unauthorized adware can be one of the most frustrating types of malware. Common tactics used by several forms of Fake Antivirus are popup windows that try to elicit activation of hyperlinks to malicious websites, usually phishing for your credit card information. Because their presentation is visual, they can be very deceptive.
Today’s most prevalent computer viruses employ a combination of all of these actions, sometimes disabling targeted antivirus programs and blocking popular antivirus websites.
It would be nice to have an omnipotent antivirus program. Unfortunately, no single program catches everything out there. It’s a good idea to have more than one—just remember some antivirus programs might not work in combination with others.
Also see two of my favorite supplemental programs that work well with others.