help with league client

hi, every time i open my league client, it says error 404 and i have to close it, then reopen it where the login screen says i have to update it again. the update size is 64.4 mb approx, and it takes a good 10 mins to update that. if anyone has a sullotion it would be appreciated. sorry for the bad grammer/spelling. [slayer-pantheon-popcorn]