Have you tried Spybot?
http://downloads-zdnet.com.com/3000-8022-10122137.html
I tried spybot and I kept getting this parasite that monitored my key strokes and the programs I opened, until it finally "educated itself" such that i could not access any web page after my home page. My computer would just freeze up. I uninstalled spybot, and all these problems went away. I later re-installed spybot and they came back. So I refuse to allow spybot on my computer.