This is getting to be an FAQ. The consensus is to use one of the following solutions:
1) Change to a non-IE browser...Opera is the favourite, but people also recommend Mozilla
2) If you want to keep IE, download the Google toolbar from Google...it has a pop-up killer which is very effective.
3) Use something called "Pop-up killer". This may no longer be available, as it is difficult for someone in his back-room at weekends to compete with Google, but it was very good.
Hope helps.
Will