Windows Service never call OnStop() method when shutdown

Question

I have simplest possible windows service.

I need service to run under Local System account.

If I start/stop service from SCM, everything works f

Answer 1

Microsoft Windows has added an option called Fast Startup which does not actually shutdown the computer.

As noted in the Fast Startup setting description, Restart isn't affected. This is why the Restart triggers OnShutdown and Shutdown does not.

Turning off Fast Startup will trigger OnShutdown for both Restart and Shutdown.