Unexpected shutdowns refer to when you’re using your computer normally and then suddenly the screen goes black. You computer may have shut down without any type of warning.
Often unexpected shutdowns are caused by excessive heat. Your computer has a safety mechnism to turn itself off if it is experiencing heat issues. This could happen if you’re running applications that are using a large portion of your CPU or graphics, like gaming. Check your fans, heatsinks, and general airflow throug the computer system. Check the BIOS to see if you can see statistics on the fan status and temperature of your system.
Unexpected shutdowns can be caused by failing hardware. Check the details in the event viewer. Check the Device Manager and run diagnostics on all your components.