Game Crashes Pc

So i hope anybody can help me because i really enjoy play league So i used to play league perfectly fine on an old hp laptop that costed 400 dollars or something I bought a new pc i play games on it like fortnite,cs:go and rocket league all fine on medium settings But league of legends seems to crash my pc like one second im in a teamfight the other second my screen is black This happened to me about 2 days ago A week ago i had a critical error I deleted the game now and i dont know should i reinstall or what should i do to fix this? Hope somebody can help me cus i really love the game