When the computer screen flips upside down, make sure not to burst a blood vessel in anger. Try to keep the profanities in check.
Simply press CTRL + ALT + Up Arrow to fix the screen. To prove this works, press CTRL + ALT + any arrow key to flip the computer screen in any direction you want.
Proceed to play jokes on your friends by flipping their computer screens when they are not looking, then tell them "That's not good, dude."
Read more: How to Fix an Upside Down Computer Screen | eHow.com http://www.ehow.com/how_2161599_fix-upside-down-computer-screen.html#ixzz19Q6m9lsb