Sudden "crash" and logout

For several game plays now, AoE IV will ‘crash’ during the middle of the game. By ‘crash’ I mean the screen goes blank and the PC logs the user out of the computer. The computer doesn’t blue screen and all other users who were logged in remained logged in so I know the PC hasn’t actually shut down. It just seems to quit the game and either go to sleep or log the user out.
I’m hoping someone may have some insights into what I could try in order to narrow this issue down.