Originally Posted by Serunson

Have you done a Microsoft update since you reformatted it back from XP to Vista?
Try Microsoft Update rather than Windows update, you might get some more options available. Just to make sure you don't have anything in your system virus/spyware wise, i would download and install the free version of AVG anti-virus from here and also install and run their anti-spyware tool from here
These can be uninstalled once the scans have been completed. Please update the products first before you run the scans.