After I minimize any game (alt-tab) there is a chance that the laptop will freeze tightly, what is the problem and how to solve it?

Question

Iron

After I turn off any game, there is a chance that the laptop will freeze tightly and reboot, what is the problem and how to solve it?
Previously, this was observed only in games from Blizzard, and now the laptop has a chance to freeze by minimizing any game from full screen mode. There is a suspicion that this happens when he tries to switch from a discrete graphics card to an integrated one.
Notebook specs:
Intel Core i7 4710HQ 2500Mhz processor Memory 12GB
DDR3L
Discrete graphics nvidia gtx 860m
Total capacity (HDD+SSD Cache) 1000GB
Optical drive DVD-RW
Bluetooth, Wi-Fi
Win 10

Answer 1

Disable integrated, look at the result.

Answer 2

update firewood on video (discrete)