active desktop... yuck. click customise desktop, then web, then uncheck everything
Click ok and apply and whatever to get you to the desktop. Then if your some sado-sick freak that likes further punishment, go back and check the box and hit synchronise (or add a replacement desktop).
Active desktop is a dreadful feature though.
If that doesn't work i'm afraid your not expressing the problem very well or your using a different os i've never used before, maybe take some screens?