And here is the Cure.
Spybot Search and Destroy
Its a free program that works somewhat like a virus scanning software but doesn't stay running in the background. What it does is scan your computer for programs called Spyware (or adware). These programs usually come piggybacked on programs like the Gator e-wallet, certian screensavers, Weatherbug, ect. They run in the background monitoring your internet activity periodically displaying popup ads and sending information about what sites you visit to a central database. Essentially, it spys on you. If that wasn't bad enough, it also uses up system resources and can cause numerous crashes, slowdowns and general system instablity. Do youself a favor and rid you system of this internet garbage.
Make sure that after installing, you run the program's built in Update to get the latest signature files so it can recognize the latest in spyware apps.