loading screen crashes

when im starting a game and the loadingscreen comes, the whole shit crashes. The screen goes black and I have to do ctrl + alt + delete to get out of there. This happend just the recent 2 games and it pisses me off so much. I closed league and then started it again. I pressed launch and reconnect but it doesnt help. This makes me afk and I get leavebuster. Please help. Should I try to restart my computer? Do you guys think it will help? [slayer-jinx-unamused] [slayer-jinx-unamused] [slayer-jinx-unamused]