Do you still have the original CD that came with your Computer?

If so, I tell you this "ONLY" as a last resort, if you really feel you need to start over.

Put the CD in and do a full system restore. It's not hard the CD will tell you what to do. But know that this will take you back to square one with your computer.

If for some reason you do, do this, re-set up you INTERNET and first things, go to those links and download the AD-Ware and Virus control. Run them and, then you can start back re-loading your computer with what ever you feel you need back. Just make sure it's a safe site.