If it contains "Fast Boot" or similar option, disable it.
users who are complaining about various restart and shutdown issues.
Many times their Windows 8 computers restart themselves as soon as the login screen appears.
If you are on Desktop, move your cursor to top-right corner of screen to access new Charms Bar.
Now click on Search option and type power in search box.
But if you -- like most people -- are using Windows 10 Home, you'll need to use workarounds to stave off Windows 10's aggressive automatic updates.