Is IE8 actually good at blocking pop-ups and adverts? I know IE6/IE7 aren't that good at it from practice, but never used IE8 that much.
Only Firefox does a good job of advert blocking.
I'm not actually sure about popups, I'm just assuming it's on par with other browsers, as it is in most other aspects. (I use admuncher as an adblocker for all my browsers.)