Im not the computer guru some of you are. Here is my issue:

My son plays minecraft on my wife's windows 8 machine. Was working fine for months. All of a sudden the game disappeared while it was open.
Close and re-open and the icon for the game is down in the tray but game is not on the screen. If you click the icon the game will "travel" from the bottom tray icon in like a split second to the top of the screen and disappear.

Deleted the old and reinstalled, same problem.

What what??