See point #6 in my 1st link & get Norbie to look at your system. He will tell you if anything is wrong. Tell us how it goes. BTW you will need to register onto his forum but it doesn't take too long.

A direct link: See NorbiesWorld (click on link) & download Hijack This program. Follow the directions from his site & then post the details in a new thread on his site. Keep him busy. Tell us how it goes.