Also, have you checked for spyware recently. If not, you might want to give that a try. Use adaware and spybot search & destroy (both free). To keep spyware off once your system is clean, use spywareblaster:
http://www.javacoolsoftware.com/spywareblaster.html. I put that on my system and haven't had a single piece of spyware in over 4 months.
