Client crashes when trying to get in game

Well I cant even update the game. I get an error for updating everytime and it just repeats

{quoted}

Right after the client updated to 6.10 I could not get into any games without it crashing.

I get this exact same thing. I'm trying to start a custom game, but it's not working at all. Just crashes every time. I tried running LoL as an admin as well.

EDIT: I just tried it with a Co-op vs. AI game and the exact same thing happens. As soon as champion select ends, it crashes. I haven't tried it in normals and I don't want to due to the chance that I screw 4 peoples' games up.