BUG / Game Freezes mid fight, can NOT alt tab, ctrl f4, or task manager close league

The game freezes randomly at least once or twice a day when I play, and I can not alt tab, f4, or task manager league to close it.

I have to COMPLETELY restart my computer.

My computer isnt frozen, just league.

I have plenty of memory and ram to handle multi applications but it continues to freeze randomly..

this happened about 1 / 1/2 patches ago.. and it keeps getting more persistant which is annoying because it can lead to leaverbusters and decay in rank when I play.