When i press "Launch" Client opens, but black

So i was in champ select and when it got to my turn, my computer froze. I get a notification that something went wrong with the graphics card or driver (idk for sure), then i got a blue screen with a big ");" on it. I restarted my computer and went to check my league and when i clicked "Launch" the login screen popped it but it was completely black. I've tried all that "go in to properties uncheck compatibility and disable drivers" stuff but it did not help a bit. Btw, i can still hear the login screen except i cant do anything at all. THERE IS NO "X" OR "-" BUTTON, ITS COMPLETELY BLACK.