Run a full scan of your anti-virus, as well as download Adware and Spybot Search and distory.

Update your virus scanner definitions and do a full scan, not a quick scan.

Also download this program and install it. http://download.cnet.com/Ad-Aware-Free-A...ubj=dl&tag=top5

Update it's definitions before you let it scan your system. Its a program called Ad Aware.

And one more....
http://download.cnet.com/Spybot-Search-amp-Destroy/3000-8022_4-10122137.html?tag=mncol
Downloads, install and update the definitions before you do a full scan.

All that will fix the sickest PC in the world.

Regards
James