This was originally posted on YouTube during late June 2023. I had a client that is not able to shutdown his PC. The is a feature called "Fast Startup" that has been part of Windows for years under several of it's versions. The problem I find is that the ability to disable it through the Widows GUI has been removed. Fortunately you still have some control over this in the Command Prompt.
The command you want is: powercfg /h off
To re-enable the command is : powercfg /h on