Have you checked to see whether or not the taskbar behaves normally while in Safe Mode? If not, restart the computer | When the Power On Self Test (POST) completes, press F8 | On the "Windows Advanced Options Menu", use the ARROW keys to select "Safe Mode", and then press ENTER | When you're prompted to select which OS to start, select "Microsoft Windows XP Home", and then press ENTER | On the "To begin, click your user name" screen, click "Administrator" | Type the administrator password (if your Administrator password is set to a blank password, don't enter a password before you click the arrow button).
If the taskbar seems to be working properly in Safe mode, then you may need to create a new user account. Let us know one way or the other, and we should be able to help you with that.
