Learn your way around the effective freeware system diagnostic app, Trend Micro HijackThis, which gives you tools to help fight off hidden intruders.
Use these tricks to make Hijack This show you only the bad stuff.
Here is basic information for how to figure out if your computer might be infected and what to do if you think it is.
Should you buy that extended warranty? Tom Merritt says no. Rafe Needleman says sometimes. We'll give you some guidance on how to decide if it's worth the money.
Once you get that new Windows 7 computer, here are the apps you need to install.
Use HijackThis to make sure you've deleted a malicious file for good.
Use HijackThis to find malware hiding in the alternate data stream.