Well, knock on wood, Howie and I have never had a computer virus. We've had to help people get rid of them, though, and they can be real boogers - as you saw!
If you are on the broadband, be sure to get yourself a router. It acts as a firewall, to prevent outside intrusions. Or at the least, be certain to have a software firewall like ZoneAlarm, available for free at
http://zonelabs.com . Windows XP has its own firewall program built in, and if you don't have another firewall program like ZoneAlarm running, be sure to have XP's on.
There's so much more to it, though...Check out these links for more info:
http://computer.howstuffworks.com/virus.htm
http://www.microsoft.com/athome/secu...s/default.mspx
One of the biggest things Howie and I recommend is for people to abandon Microsoft Outlook/Outlook Express and Internet Explorer. Those programs, partly due to their popularity and partly due to their security vulnerabilities, are targets for hackers and virus writers. We suggest the excellent Firefox browser and Thunderbird e-mail programs, available free at
http://www.mozilla.org . This Wall Street Journal article sums it up:
http://ptech.wsj.com/archive/ptech-20041230.html
Please note that you can't completely get rid of Internet Explorer because it is needed for you to run Windows Update, something every Windows user should be doing regularly. Outlook and Outlook Express, however, can be uninstalled if you don't use them.