There are two sources of popup windows, those from the websites you visit and the other from Spyware. The first is easy to stop and ill show you how. If it doesn't stop popups then you most likely have spyware on your computer. Click Here For My Top Spyware Removal Software Recommendations

If you don't have spyware on your computer there is a very easy way to stop popups in their tracks from our friends at google. It is the Google Toolbar. It is a free program you can download here. Not only does it stop popups it also keeps track of how many it blocks so you can surf and get pleasure from knowing just how much crap you are avoiding. Enjoy your new popup free surfing!