Q: A file got placed on the key board and some how the screen went upside down. Is there a key stroke that can reverse this.
A: You could start the computer in VGA or safe mode, which will revert the screen to a basic setting. Then once in this mode, enter display properties and set the resolution - you may be limited to setting it at 640 x 480, but make sure you do, 'cause then when you restart those changes will be permanent and the problem should be solved. Now just reset the resolution to what you were using (perhaps 1280x1024 or 1650x1080 if it is widescreen)