Download Ad-Aware http://www.majorgeeks.com/download506.html and run the scan.
Then also run a virus scan from here http://housecall.trendmicro.com/
After all this still don't solve the problem, I will suggest you reformat your hard drive and have a clean installation of window again.
Then also run a virus scan from here http://housecall.trendmicro.com/
After all this still don't solve the problem, I will suggest you reformat your hard drive and have a clean installation of window again.