Racx, Have you also run Adaware, Spybot -- Search and Destroy and Spy Sweeper by Webroot for problems? I also like SpywareBlaster that keeps spyware/adware from getting on your computer. (Maybe the hacker was able to get in through a backdoor that only one of these anti-spyware programs can pick up)
I use Spy Sweeper, CyberScrub and Spybot