Desktop turned upside down

[MacDiesel]

while playing two different games today my desktop turned upside down. i had to use system restore to get it back to normal. can someone please tell me why this is happening????

 

[nmrpa]

sounds like a virus for sure

 

[Amd2800]

Because ur system overloaded

 

[Vormund]

You mean it was literally like the screen was upside down?!

I did a quick Google search:
http://8help.osu.edu/1722.html

Within Windows XP, certain video drivers or graphics card chipsets supporting 180 degree screen rotation can cause the Windows XP display to be presented upside down. This can be (but is not always) tied to lowering the screen resolution in some accessibility programs.

To revert to a right-side up display, hold down the CTRL, ALT and UP (arrow) keys.

Hope that helps..