Computer reboots when i close or alt tab from cs:go

[Zeeve]

I am able to access the game and play without any problems. however if i alt tab or close the game, my computer shuts down and reboots and i get a windows has recovered from an unexpected error message.

My computer is 2 weeks old and has the following specs
Intel i5-4460 (1150) CPU
MSI Z97 GAMING 5 MAINBOARD
G SKILL RIPJAWS-X 14900/1866MHZ 4GB (2 of them so 8 GB RAM)
WD 1TB BLUE 64MB 35" SATA3 HDD
MSI GTX 970 4GB TWIN FROZR V O.C PCI-E
CORSAIR RM SERIES 750W GOLD PSU

i have 3 fans within my rig so i doubt its an overheating problem. I have updated my drivers and bios via the msi website downloads so i have no idea what is going on. Brought my rig back to the guy who assembled it and he changed me a new motherboard but its still happening. Any help is appreciated

[_I_]

specs look good, are you bumping the power cord or hitting the power/reset buttons?

does windows run disk check or say it recovered from an improper shutdown?

[Zeeve]

nope i am doing nothing to it. basically it justs power downs by itself like a sudden power cut. after that it reboots and goes to the screen where u get to select safe mode or start windows normally. when i get to windows it says " windows has recovered from an unexpected error" and tells me its a blue screen

[76561198146916803]

Run error tests on the HDD and RAM.

[mirisbowring]

perhaps its a nvidia driver bug...

(i'm not sure where to find the english page because i'm german) but yesterday i read that the new nvidia driver has a bug that restart the pc from some people...

perhaps that's the reason

[Zeeve]

i see thanks for letting me know. maybe thats the reason cause my driver is updated to the latest version