Say it isn't so! I just got a pop-up ad.... here on ET. The last bastion of free speech has been polluted by pop-up ads. Say it ain't so Baron! Oh...you'd have to charge us if you couldn't run the pop-ups? Hey Baron, those pop-up ads are great! Keep up the good work! It sure is wonderful that this is a free site. Wow, you really are a very kind and generous person... no matter what Don Bright says about you.
It's not ET, it's probably spyware installed on your computer. Download adaware and clean your spyware.
I surf with Opera browser (it's free... www.opera.com). It has a pop-up killer which has been 100% effective. Opera also seems faster and better at caching than IE or netscape. I use it all the time except for the few sites where it's not compatible... then it's IE.