Game is crashing my entire system

I've had the same over the past few weeks. I had no issues up until then with 200 hrs played. It happens randomly, sometimes i can run a few games but last night i just had to turn it off it was happening that constantly even in the menus. 

The game screen would go black however could still talk to and hear friends on discord then 5 to 10 seconds later the pc would reboot. Sometimes it didnt even do that and just instantly reboot. 

I did a stress test on my gpu and cpu with no issues, downloaded another game (hogawarts) thinking ill try another game to see what happens, no issues. 

Event viewer isnt showing me anything that could be the problem. The only thing that showed originally was a critical TPM error which looks to have gone since i updated my bios as i thought that was the cause but not seeing that error anymore.

I've had a look online, hence finding this recent post and theres so many views however im putting it down to the game, this is the only game it happens too and i havent found any component issues, will have a go at uninstalling and re installing and see if that helps but thats probably as far as ill go.

MiniMuffinz​ did you get an error on rebboting the game that the save file was corrupt and it makes you watch the full intro and the settings are reset?