since you mentioned an infection Please go to the malware
forum in my signature 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 THAT
If you are still having problems after getting a clean bill of health from the malware expert, please return to this
because you may have something else lurking in there...
also do start > run > ipconfig /all and post the results in here...
remember...keep the HJT log and all malware stuff in your malware thread...just show the ipconfig here.