This policy setting configures the number of minutes the system waits for the hung logon sessions before proceeding with the system shutdown.If you enable this policy setting the system waits for the hung logon sessions for the number of minutes specified.If you disable or do not configure this policy setting the default timeout value is 3 minutes for workstations and 15 minutes for servers.
Policy path:
Windows Components\Shutdown Options
Scope:
Machine
Supported on:
At least Windows Vista
Registry settings:
HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\System!ShutdownSessionTimeout
Filename:
WinInit.admx