Hi John,

If your PC is unexpectedly getting shut down, it's almost certainly overheated. The PC, which monitors the temperature of the CPU, is protecting it's delicate circuits from the ravages of heat.

There are ways of checking the CPU temperature including the utility SpeedFan. Software like SpeedFan can be downloaded to help gauge the temperature of your computer in different areas by monitoring the sensors. Cooling pads can also be purchased for laptops.

This can happen for several reasons like your computer’s case may be full of dust, a fan may have failed, or something may be blocking your computer’s vents.

You can try the below steps in order to make it work properly:

• Make sure nothing is blocking the PC's air vents.
• Unplug the PC and open it up. Use a can of compressed air to remove dust, especially around the fans and vents.
• While the PC is open, note the position of the internal cables. Are any of them blocking vents or air flow?
• Plug in the PC--while it's still open--and boot it to make sure that all the fans run properly. If one isn't spinning, try to find out and fix what's blocking it.
• Ensure Proper Ventilation: Put the computer in a location where it can properly ventilate itself. If it’s a desktop, don’t push the case up against a wall so that the computer’s vents become blocked or leave it near a radiator or heating vent. If it’s a laptop, be careful to not block its air vents, particularly when doing something demanding.

Another Fix: Uninstall the video card drivers
After uninstalling, restart the computer and let windows install the generic drivers and then check if the HD videos play fine.
It's best to let Windows install drivers automatically. Occasionally, Windows might not be able to find a driver for your device. If this happens, you might want to check the manufacturer's website for a driver or update for the device, or try installing any software that came with the device.

Remove any new hardware
Adding new hardware can cause this error to occur if the hardware is defective, the driver is defective or the hardware is not compatible with the computer.  To check if this is the case, turn off the computer, remove the new hardware you added to the computer and restart the computer to see if the error occurs again.
If it does not, you may need to get a new piece of hardware.
You can also try downloading the latest driver software from the manufacturer website and install that driver software instead of the software that came with the hardware.
Also, make sure your computer meets the minimum requirements needed to use the new piece of hardware.

I hope this helps.

Regards,
Lokesh