Originally Posted by TheDoc

Trendmicro offers an online scanner that snags all types of virus, spyware/malware, and open exploits on your machine. I use it, overall the best cleaning software in my opinion, and it's free.

Before bed, turn off your screen saver and power savers, go through the small setup needed, and let it run. It scans for a lot of stuff so it takes awhile.

http://www.trendmicro.com/hc_intro/default.asp