I had this problem awhile ago.
If you're getting pop ups when your browser is closed then it isn't related to you internet browser but to your Windows OS, your internet connection, and some program that's open (such as Kazaa). I'm just assuming right now that you have Windows XP because that's were I had my problem. The pop up stems from a program built into Windows XP that is turned on by default when Windows XP is first installed. As long as you're connected online you will keep getting these "pop ups". In order to get rid of these pop ups you'll need to turn off the Messenger Services (not to be confused with MSN Messenger
). There are details about how to turn the service off and also some more information about what turning Messenger Services off does:
http://www.opentechsupport.net/forums/arch...ic/11211-1.html
I think these pop ups only come out when you're running a program that is sending them out. I think Kazaa use to do this at one point that is why I keep refering to it. I'm sure other programs are using this pop up method so you may need to do some deducing work of your own to find the source program.
I hope this helps in getting rid of the pop ups.