So I was playing my computer then i accidently hit the wrong keys then my screen goes black.. it comes back and it is upside down!!!. I am assuming i hit some kind of macro bindin that made my computer do this. I already tried a restart to see if it would go back but it didn't work. I have been mashing away on my keyboard for like 30 min now.
   If any one knows what the binding is or any suggestiong to fixing this problem it will be apprciated. (I am already googling it but no luck so far)   

 I am using window XP

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