How to fix thsi???!!!

This looks like a bugged loading screen, are you able to progress to the actual game when it is done loading?

That's some freaky shit.

Looks like it's your computer problem, try bringing it for a repair service perhaps?

I got something similar to this except for me it was at the end of a game (were the game closes and normally we see the score and stuff) my whole computer crashed and there was a blue screen with white stripes and there was a loud BEEEEEEEEP sound going. I had to pull the plug to restart the computer. I will try to end a game one more time and i'll see if it does it. Kinda scared to play LoL now. I dont want my computer to get damaged by Riot's incompetence.