[CLIENT]/[CRASH]- Black Loading Screen

The loading screen instead of displaying the champions for the game was all black except for the cursor. The black screen prevents other programs from showing in-front of it so things like task manager were unable to be accessed. ALT-F4 was also unsuccessful in making it go away. Eventually it caused my computer to crash and shutdown. When rebooted I opened up league and it showed the "Game is still in progress.." message on the client but didn't actually load me into the game. In-game my friend said the there was no prompt message for remaking, only the message stating the remake period has expired. This left me unable to start a new game aswell.

1. Get into a game
2. Loading screen turns black
3. Try to ALT-TAB to another program
4. Try to open task manager
5. Try ALT-F4
6. Computer crashes and reboots
7. Open league client when rebooted and get message saying I'm still in a game but doesn't actually load me into game

First time I have received a black screen on the loading screen.