Maybe get a dedicated pop up blocker. Try downloading the Google Toolbar. It's got an ad blocker on it. I'm using it on my laptop and desktop and loving it. Couple that with Norton Firewall and you get ad blocking and intrusion detecting too. Microsoft Antispyware is an excellent antispyware program to use and it's free to download.
*Fact: Microsoft Window's Blue Screen of Death vs Computerforums.org's White Screen of Death. Which is worse?