First try updating the BIOS, it will be only possible fix without opening. If that doesn’t work you will have to open. What I did was when tablet open I took a roll of tape and lightly rolled on shield to create a little more pressure underneath so the shield Is touching the pads below. Then there is thermal pads on top of the I folded them to ensure they are touching the tablet case to better dissipate the heat. Since doing this shutdown in Windows doesn’t occur any more (knock on wood)