pressing Ctrl, Alt, and the arrow keys can rotate and flip over the display. You may also have accidentally bumped the up arrow while using Ctrl-Alt-Del. also going back to a day or two before the problem occoured might help out as well.....
another thing, if anyone else has access to your computer, there are several joke virus's that do this (as a real bad, and ever-so-tasteless joke) you could always run a Housecall
online virus scan (free)
by TrendMicro.... just check the box to auto clean. If you use Internet Explorer, you will be required to download and install an Active X object before you can scan, If using Firefox, or Opera, just having Java (jre) is all that is required.
Edited by jaybeast69, 30 December 2005 - 09:06 PM.