Gmod crashing with no reasons?

So I recently got a new PC all that I need to say is that i have Windows 8.1 because I can play the game.
anyway so i’ve deleted every add on and deleted the game and reinstalled it, i can play single player but only for a while like a hour. i’ve also verified the game cache
It just randomly closes with no errors, i’m also getting this with CS:GO after like 45 mins I get a error saying cs:go.exe has stopped working.
Can anyone help with the gmod thing!? <3

If it also happens in CS:GO then the problem is not with the games, but with something in your system I’d guess.

It doesn’t happened with any other games, It might of been my old monitor…

Uh, but you just told us it does?

only with those two.

They both run on the same engine ( different versions or it ). As I said if it also happens in CS:GO then the problem is not with the games, but with something in your system I’d guess.

It doesn’t happen on CS:S