Client crashing

I was playing as normal, as all of a sudden the client needed to be updated, so me thinking everything will be okay, pressed okay, and then crap hit the fan. Whenever I launch league an error pops out after the ''League of Legends'' logo. The error says ''League of Legends has stopped working'', restarted my computer, reinstalled League, still getting the same error out of nowhere, would appretiate some help.

[zombie-nunu-tears]