Causes of Windows 10 Shut Down Issues
The cause of an incomplete Windows 10 shutdown is the Fast Startup feature, which allows the computer to start up quickly from a hibernation state. This process is useful most of the time to get a computer up and running quickly, but it may get stuck sometimes, and may not be a strong-enough shutdown to resolve certain system errors.
How to Get Windows 10 to Shut Down
Because most Windows 10 shutdown issues are caused by the Fast Startup feature, the best way to alleviate these issues is to try a more direct way of telling Windows to shut down. Try these alternative options before getting frustrated and holding down the power button.
Power Cycling
Avoid hard power cycles—that is, where you pull the plug, or press and hold the power button for 15 seconds to force an immediate hardware halt. These processes do not allow Windows the opportunity to write temp files to disk. This increases the odds of corrupting an important system file or losing your work.