Client install crashing my computer

So, one day i was trying to play and when the client would boot up from an ARAM game it would give me an error and crash, so i decided to reinstall league and after uninstalling it, trying to reinstall with the new client any time i get to like 20% or 45% my entire CPU stops working and everything crashes, not sure why this is but i really want to play league and was wondering if anyone had any idea why i cant get the new client to install without crashing