Configure auto-restart warning notifications schedule for updates

Policy ID: RestartWarnRemind
Scope: Computer Configuration
Supported on: Windows Server 2016 through Windows Server 2022, or Windows 10
Source: Administrative Templates (.admx) for Windows 11 2026 Update (26H2) (version 1.0)
Category: Windows Components › Windows Update › Legacy Policies

Description

Enable this policy to control when notifications are displayed to warn users about a scheduled restart for the update installation deadline. Users are not able to postpone the scheduled restart once the deadline has been reached and the restart is automatically executed.

Specifies the amount of time prior to a scheduled restart to display the warning reminder to the user.

You can specify the amount of time prior to a scheduled restart to notify the user that the auto restart is imminent to allow them time to save their work.

If you disable or do not configure this policy, the default notification behaviors will be used.

Options

Specify the period for auto-restart warning reminder notifications:
Reminder (hours):
- 2
- 4
- 8
- 12
- 24
Specify the period for auto-restart immiment warning notifications:
Warning (mins):
- 15
- 30
- 60

Registry

ComputerHKEY_LOCAL_MACHINE

HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate View registry values

SetRestartWarningSchdREG_DWORD
ScheduleRestartWarningREG_DWORD
ScheduleImminentRestartWarningREG_DWORD

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