Game crashes at around 6-10 minutes every game [CRASH]

Every game, whether it's an ARAM or norms and even in my ranked games (It has happened to me in each of these), my game crashes at around 6-10 minutes into the game. The crash is basically the game freezes, I can move my mouse, I can hear the music, but all the other noises stop and the screen freezes. Nothing crashes in my custom games when i'm the only player but it crashes in every other instance.

The game doesn't even give me a bugsplat report it just freezes and the only way for me to fix it is by alt+f4. I tried playing a game in fullscreen instead of windowed mode like i usually do but i couldn't even alt+f4. I had to restart my entire computer. The game is basically unplayable.