This policy setting controls whether the lock screen appears for users.If you enable this policy setting users that are not required to press CTRL + ALT + DEL before signing in will see their selected tile after locking their PC.If you disable or do not configure this policy setting users that are not required to press CTRL + ALT + DEL before signing in will see a lock screen after locking their PC. They must dismiss the lock screen using touch the keyboard or by dragging it with the mouse.
Policy path:
Control Panel\Personalization
Scope:
Machine
Supported on:
At least Windows Server 2012 Windows 8 or Windows RT
Registry settings:
HKLM\Software\Policies\Microsoft\Windows\Personalization!NoLockScreen
Filename:
ControlPanelDisplay.admx