Well it depends a little on how the pop ups are displayed on your PC but if you want to turn off the messenger service for good on windows 2000/xp
Right click "My Computer" (XP users can do this in the start menu) & select manage, then find services on the left hand side of this window, open it up, click the stop button & set it to disabled, clikc ok to save the settings.
Here's a picture if that doesn't explain it well enough....
http://i2.photobucket.com/albums/y39/chris_bea/messenger.jpgI'd highly recommend using Firefox instead of Internet Explorer to surf the internet, don't worry you can use this forum fine with it!!!
get that from here
http://www.mozilla.org/products/firefox/& be sure to run windows update (you'll have to do this in internet explorer I'm afraid
) do that at this link right now!!
http://windowsupdate.microsoft.com/That's the basics, but you'll most likely need some sort of firewall software as well. be sure to clean your pc by downloading the software simon mentioned as well!!