I helped a friend who was having trouble with the internet reacently. I diagnosed the problem to be spyware(he couldn't surf for more than 5 minuts before his connection bogged down with spyware calling home and popups takeing over). here's his add aware results after 4 scans(yes it took 4 scans to clean everything out).
Note: It took useing windows ftp to get opera before I could get adaware