[Client] Black Screen - Game Loading Screen Bug

So once a day or so i go into a game and the loading screen stays black and so i tab out and in when i tab back in the black screen is still there but on the right i can see a strip of my desktop. Most of the time i have to Alt - F4 twice and Re-log and by the time i've done that i get reported for afk and the game is about 5 minutes in... Anybody else getting this Problem! If so is there any way i can fix it? Thanks!