My wife's office computer has a strange problem I don't recall ever seeing before. Running XP SP2, when you hover over the list of programs in the Programs menu of the Start Menu, nothing highlights and you're not able to select anything. Clicking anywhere in the menu actually closes the entire Start Menu and takes you back to the desktop. I created a new user account on the machine and logged in under that, but the problem repeated itself there. Right now she has to reboot, and that will fix it for some random amount of time before it starts happening again. I haven't looked into System Restore, yet.