Seems like i solved this anyways by turing everything to minimum quality but iam using a laptop with geforce gtx 950M (4gb) , 8gm ram, i7 6700.
Only happened with cs go, but it was like i play for 30mins and then my laptop turned off always. (happened like 5 times total)
My laptop is cold so i doubt its overheating and its always plugged in when playing.

any advice whats the problem ?

To be sure about overheating isnt the issue. Download speccy from piriforms website and check temps during play

This, can post a screenshot as well.
Could be many things tbh.

Ill do this but my laptop could run maffia 3 , witcher3 without a problem... Thought cs has shitty game req and wont overheat if far better games works perfect

Get SPECCY here: http://www.piriform.com/speccy/download
...get the FREE version from the: Piriform Link
...Speccy is a really nice system hardware/temperature, information Utility.
...simply install it...and run the program...then post a screen shot of the main page of the program, when posting a problem/question on these forums.

Ill do this, should i turn back the game quality? Since i changed everything to low it never turned off.
Or should i check the temp. with the low quality settings ?

this s/s before playing cs go or anything ( just booted my laptop )
Ill play now and add the new s/s later.

After an hour playing with cs go:

Should i make another s/s after like 2hours of playing ?

I'd clean out the laptop, and then get a cooling pad ASAP.