sideways windows

[brickman49240]

I have a Dell latitude 610 that I recently acquired at a garage sale that looks to be in very good shape. It is running windows 7, though I am getting messages saying it could be a counterfeit copy. Last night I was carrying it from the living room to the bedroom, and by the time I got into the bedroom windows had turned sideways! Rebooting it doesn't help. Everything looks find and rightly positioned while it's loading up till it's finished loading windows, at which point windows is turned sideways on the screen. I have no clue what I might have done, if anything to cause it. Is there some magic button sequence that will turn windows sideways? Does anyone out there have any idea what might have happened or how to fix it?

thanks

 

[TrainableMan]

It is likely just a setting of your video card. See HERE.