New Client Bug

Since I've updated the new client its been impossible for me to play. I entered into the champion select and I could writte in the chat and pick up a lane. Then when the champion select ended, the game didnt load and my screen turned completely black. I couldn't do anything I couldn't click nothing so I had to foce my computer to shut down. I rebooted the PC and when it turned on I don't know how but I managed to enter in the game that was still active. When I was in to my souprise My champion (Cassiopeia) didn't move and I couldn't open the shop move or upgrade the first ability. So I tried to close the game but my computer bugged again, and I couldnt close it. So I had to force the computer to turn off for a second time. I'm quite mad, because now I will get the leaver buster and I could've probably injuried my computer because of a game error and not mine. I would like a solution or help for this.