Sorry to be a know it all sound off but THIS IS WHAT YOU MUST DO:
Download Hijack This which is a tracker that will produce a saveable list of all your running processes (running processes are necessary but in here the baddies also reside):
info is here:
http://www.spywareinfo.com/~merijn/downloads.html
Direct download is here:
http://www.merijn.org/files/hijackthis.zip
Open and run this file then post your problem and the hijack this file here:
http://forums.spywareinfo.com/
These guys will then give you a step by step removal procedure.