League blue screen

Well I don't understand what's happening.Months ago i coulded play league with 170 fps and 30 ping, then with new patches something happened.I had some buggs and then, while I was in game, my pc made a blue screen.I repair it and from that moment i was forced to play with ethernet because with wifi was too slow.It happened again 2 times(blue screen), I changed the hard disk too(I have an ssd now)and now it happened again after a few buggs.This is a critical problem that happened only on LoL.I played far cry, aot2, dbXv2 and was all so good.What is happening guys?