pc rebooting

[loco]

Ok so i just got my pc back form ocuk!
after getting up to around 80+% and just shutting down with no errors
i sent it back for repair.
i have my test report back from ocuk saying they have run vigorous testing on the hardware and that there is no issue with it.
yet the pc reboots when playing games?
so i am now down to is it corrupt drivers as there saying it is not a hardware issue.
there telling me it is software corruption with the games or Operating system
anyone have any thoughts on how to trouble shoot this issue
can anyone else recommend anything i could try to find the issue out
running on driver version 362.00.
should i remove my entire game library and re install all my games?
i have done a system restore and it still shuts down after that.
thanks.

 

[ots3go]

Shuts down or powers off completely?

Have you reinstalled the OS?

Would it be possible to provide the system specification?

 

[loco]

Hi yes it totally shuts off,
and if i reboot it shows no error messages,
the machine is
skylake 6700k 4.5ghz with H100i cooler with 240mm fans
corsair carbide 540 case with 3x 120mm corsair fans front
1x 140mm corsair fan rear
16gig ddr4 3000mhz dominator ram
1000w evga psu
edition KFA 980ti 8 pack edition graphics card.
1.0tb Samsung ssd.
was running around 65deg in the past never got up in the 80's
the pc is spotless no dust.
ocuk have run all the relevant stress tests on memory,board, cpu and graphics card.
so i either have to reformat, or i guess try graphics card drivers first
failing that it might be something to do with win 10 and its automatic updates?
not sure.