Ok here's what you wanna do.

1. Download Spybot S&D as he suggested. Run it and remove whatever it finds.

2. If you still have the same problem download and run Ewido Anti-Malware (http://www.ewido.net/en) It's a 14 day trial but it is some of the best software out there.

3. After all of that if you are still having problems then I would try TrendMicro's Housecall It's Free and works well. http://housecall.trendmicro.com

4. Now if for some awful reason you are still having problems then you have a deeper infection that is beyond normal cleaning. Which means more than likely your computer automatic update downloader has been hijacked and infected. In which case you would need to run HiJackThis (Find it on Google) save the log and post a copy here. From there I can help you better resolve your problem.

Hope this helps and keep me updated I am sure I can help you fix your problem.

*Edit* - Do you have a small icon where your Automatic Update Downloader would be? In the form of some yellow triangle with an exclamation mark or a Red Circle? If so this definately means you have been infected by the Smitfraud Exploit.

-Allshow97
PC Support Specialist / Network Administrator
Motorsports Authentics