game freeze help me

ok so when i logged on my game yesterday everything was fine so i satrted a game, then in the loading screen it just froze 4 a sec then it took me out and sent me a bugsplat so i tried again this time i entered the game. then like 3-4 min ingame my game just froze again and this time i had to cut the power of the pc to get the pc off then when i took the pc on again, opened league, logged on, entered the game then it frooze after like 15 sec, then i was tired of it and didnt try again in a bit. so i just took the pc off then waited a bit... then i joined another game this time same stuff happend like 15 sec ingame it chrashed and i had 2 take my pc off again then i tried 1 moore time and yea same stuff happend so had 2 restart pc again. i tried 2 join a custom game but then i chrashed after 9 sec so i joned again after restarting pc, again it chrashed.

i tried it on a different acount (on the same pc) and joined a custom game nothing happen. could some1 tell me how i can fix my acount or what the issue is? (just happen 2 both my acounts...) [zombie-brand-mindblown] (PS) not that good in English;D anny1 else having same issue???