Malicious software, or malware, is likely the most widespread problem faced by computer users today. As a computer technician, I find that about three out of four jobs I do for home computer users are to remove malware in one form or another.

Malware programs come in several forms: Spyware and adware track your activities when surfing the Internet and bombard you with pop-up advertisements. Hijackers change browser start pages and redirect you to unwanted web sites. Viruses and trojans erase data and allow hackers to access your files. In many cases, the end result is that your computer becomes unusable and in need of repair.

Many computer users try to protect their computers by installing anti-virus and firewall programs. While these programs are of value, they alone are not sufficient to fix and prevent all types of attacks. Many computers with up-to-date anti-virus and firewall software arrive at my door infested with malware to the extent that they are unusable.

I have found user education to be the most effective deterrent to malware. Here is a list of things you can do to keep your computer healthy:


1. Be skeptical of free software

There are many free software programs available on the Internet. Unfortunately, many of these are bundled with malware designed to display pop-up ads or monitor your browsing activities. Some even go further by regularly downloading additional malware without notifying you.

Here are some common examples of free software that can contain malware:

Screen savers
AIM buddy icons
Desktop background pictures
Email