Last year, my work PC became so infected with spyware that the systems librarian had to wipe it. We have something like CounterSpy??? which the school pays for, but she's encouraged us to download and use Spybot Search & Destroy and Ad-Aware. I also use SpywareBlaster, which I like a lot. The other two make you scan and they delete the spyware after the fact. SpywareBlaster does it as you surf. I downloaded all three programs from MajorGeeks.com . You just need to remember to update them often.