Those windows that pop up trying to sell you a digital camers, or whatever???  I got tired of them just filling up my memory and ask my son (he's in the computer business) how to eliminate them.  He referred me to the analogx.com site where they have a little ditty that you can install and it will monitor your browser communications over the internet and intersept the pop up windows and automatically eliminate them.  It is called POW! You can get a free copy downloaded at this link:

 

 

Scroll down 'till you see Browser Addons and select POW!  This site has some other good internet utilities as well.  I also got the Cookie Wall and the Script Defender.  The POW! works like a charm ..... no more pop-ups.