Gmod closing randomly.

Well since i got my new pc, gmod seems to randomly close at a random time after 15 minutes add or take.
It just turns black and closes, takes about 4 seconds, and when it closes it displays no errors, no steam news, nothing. I don’t think it’s my addons because from what i remember it’s since i got my pc. (July 26)
It’s fine with other source/steam games- Css and the rest work fine.
So i come to you facepunch. Help me.

I’m having the same problem.