Microsoft veteran engineer Raymond Chen explains the "app is preventing shutdown" warning that can get in the way.

The best version of the system would reboot as many times as needed and then 'remember' to shut down as requested. That seems to be how it's meant to work in Windows 11. But it doesn't.

Consequently, selecting “Update and Shut Down” may not deliver the expected outcome, leading to a reboot instead. This issue isn’t exclusive to Windows 11 and 10, as users have also reported ...