Game doesn't crash but thinks its at desktop.

You know when you are in windows and you hold down a key and you get that annoying ring ding spam.

So i am playing the game in borderless window or windowed mode and all of a sudden while playing its like it forgets it is in the game. I dont' tab to another window it just thinks its at the desktop it might happen like every 2 minutes.

Its like it forgets its in the game my mouse is still there if i click the window it goes back to playing as normal.

Any guesses.

I can't play in full window because my mouse cursor disappears cause of the vista problem.