[CRASH]

I was in champ select and after the countdown had finished, the client did was frozen. It did not send me into the game, so I closed the client and 20 seconds later the game opened up. It said to retry the connection and it did not work. So then I tried opening the client and nothing happened. So, I restarted my computer and try to open league again. When I did, all I saw was a blank blue screen for 2 minutes. I tried shutting down and then powering on one last time. It opened but, it was already too late... I just want to know how to fix the problem and if my leaverbuster could be removed. This never happens as my PC is not slow.