Computer crashing after log in

ok, so ive recently reinstalled league and then had this same problem before the urf patch, with the urf patch i was able to play, and now this new patch fucked up my game again, my whole computer seizes up and i have to do hard shutdown, you fixed this bug once FIX IT AGAIN, do you have any clue how much money i gave to this game? its a whole lot, i expect to be able to play this fucking game