Change the Start Menu Power buttontoShutDowninsteadofsleep

Open the Control Panel and click on Power Options. Select the Power Plan that you want to use and click on "Change plan settings". Click on Change advanced power settings, double click on "Power buttons and lid". Double click on "Start menu power button", change the Setting to Shut down.
Or,.. merge PowerButtonShutdown.reg and Log off or Restart to apply changes.