Please go to the malware
forum and follow the instructions at the top....Especially the CLICK HERE.
That will give you several steps that will help you clean up 70 percent of all problems by yourself. If at the end of the process you are still having difficulty (and you may not be) then post a hijackthis log in THE MALWARE FORUM
forum.(Posting HiJack This logs in any other forum other than the malware forum is forbidden. If you post an HJT log in any other forum, it will be removed and it will take you longer to get help, so please make sure you only post HJT logs in the malware forum)
If you are still having problems after getting a clean bill of health from the malware expert, please return to this