Game Crash

Right out of champion select my client crashed, now showing up as a "Leave" on my match history, I restarted my computer twice, and reopened and tried to connect to my game that lol would not let me in for the entire 20 minutes and 51 seconds that the game lasted. Once again, this is showing up as a "Leave" for me. Not okay. The game is crashing if I try to load a game. This should be addressed as soon as possible.