League crashes whole computer?

Hi LoL players, since the beginning of time, (when I started playing LoL) I have suffered from this problem from game to game, where my game would stutter for a couple of seconds, and then completely crash my computer. This usually only happens to League. It doesn't crash any other games, like ones on Steam, although CSGO did crash my computer similarly to the way it does with League. The weird thing is that these crashes only happen during early game, really causing me to fall behind when I reconnect. Since these crashes only occur early game, it makes me think that I have a rat on my computer, but it could just be my computer overheating.

Any help?