When I use Mozilla, I keep getting full screen popups about different ADs that are hard to close and freeze my computer to the point I have to restart it. I also have been getting a lot of script is busy or stopped working error messages. This happens worst in my Yahoo email, and has gotten worse since I upgraded to Mozilla optimized for Yahoo. I found out the popups are being created by mediaforceltd. Please help! I'm using windows XP home edition. These problems rarely occur when I use Internet Explorer.