Run a Script at Shutdown (OnShutdown)

Unfortunately Windows does not bring a simple option to run a script/command at shutdown. There are some ways to do this, but all of this ways are no reliable and does not always works if you use fastboot.

Unreliable methods of running script/command at shutdown:

Group Policy Shutdown can be terminated early, doesn't fire when fastboot is enabled (default in Win10+) and isn't supported on Server Core 1909 Register-WmiEvent -Class Win32_ComputerShutdownEvent can be terminated early, doesn't fire when fastboot is enabled (default in Win10+) and fails on Server Core 1909 Task event trigger on event id 1074 (<Select Path="System">*[System[Provider[@Name='User32'] and EventID=1074]]</Select>) depends on EventLog and TaskScheduler and doesn't fire reliably (or at all on Server Core 1909)