Game keeps crashing after the new client update.

So everytime i try to play the game, it crashes. It's fine at first (and it doesnt happen every game) but after a few minutes my laptop just freezes and i have to restart everything. Now after the last crash i saw that my pc gave a message 'Leaugue of Legends is blocked by the ghrapic program'. No idea how i have to fix this, it never gave this message at the previous crashes though. Can anyone please help me? :) I'm tired of getting reported everytime because i am 'afk' and i want to play ranked again but i don't want to when i keep crashing, would be unfair for my team.