I had this with a recalcitrant laptop which became stubborn at me using the 'power' button to shut down the laptop, despite me having set that as an option in power settings.
Try loading in 'safe' mode and after a couple of minutes, shut down using the Start menu/ Shutdown button at the bottom left side of your Taskbar. Allow pc to shutdown and all disc activity to cease before switching off power supply. In safe mode only basic drivers are loaded so it will look a bit strange.
No idea why it worked, but it did for me.
Always tend to use the Windows shutdown option rather than the power off button.