Popup's and ad's in general are annoying but using Opera as browser will eliminate all popup's and then AdMuncher removes adds from all webpages pretty nicely
IE has its own pop up blocker...I was using admuncher but they want money for it....if you use yahoo and the IE one nothing will come up...only problem is one of them is a little too strong and prevents links from opening a new page
IE and yahoo do have pop-up blockers, but they were both pretty bad for me. Ever since I started using firefox last year, I haven't had any problems at all. I hate using computers at school that only have internet explorer installed.