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152 lines
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152 lines
12 KiB
Markdown
---
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title: Manage device restarts after updates (Windows 10)
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description: tbd
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ms.prod: w10
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ms.mktglfcycl: manage
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ms.sitesec: library
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author: DaniHalfin
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localizationpriority: high
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---
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# Manage device restarts after updates
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**Applies to**
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- Windows 10
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- Windows 10 Mobile
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> **Looking for consumer information?** See [Windows Update: FAQ](https://support.microsoft.com/help/12373/windows-update-faq)
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You can use Group Policy settings, mobile device management (MDM) or Registry (not recommended) to configure when devices will restart after a Windows 10 update is installed. You can schedule update installation and set policies for restart, configure active hours for when restarts will not occur, or you can do both.
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## Schedule update installation
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In Group Policy, within **Configure Automatic Updates**, you can configure a forced restart after a specified instllation time.
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To set the time, you need to go to **Configure Automatic Updates**, select option **4 - Auto download and schedule the instal**, and then enter a time in the **Scheduled install time** dropdown. Alternatively, you can specify that installtion will occur during the automatic maintenance time (configured using **Computer Configuration\Administrative Templates\Windows Components\Maintenance Scheduler**).
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**Always automatically restart at the scheduled time** forces a restart after the specified installation time and lets you configure a timer to warn a signed-in user that a restart is going to occur.
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While not recommended, the same result can be achieved through Registry. Under **HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate\AU**, set **AuOptions** to **4**, set the install time with **ScheduledInstallTime**, enable **AlwaysAutoRebootAtScheduledTime** and specify the delay in minutes through **AlwaysAutoRebootAtScheduledTimeMinutes**. Similar to Group Policy, **AlwaysAutoRebootAtScheduledTimeMinutes** sets the timer to warn a signed-in user that a restart is going to occur.
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For a detailed description of these regsitry keys, see [Registry keys used to manage restart](#registry-keys-used-to-manage-restart).
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## Delay automatic reboot
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When **Configure Automatic Updates** is enabled in Group Policy, you can enable one of the following additional policies to delay an automatic reboot after update installtion:
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- **Turn off auto-restart for updates during active hours** prevents automatic restart during active hours.
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- **No auto-restart with logged on users for scheduled automatic updates installations** prevents automatic restart when a user is signed in. If a user schedules the restart in the update notification, the device will restart at the time the user specifies even if a user is signed in at the time. This policy only applies when **Configure Automatic Updates** is set to option **4-Auto download and schedule the install**.
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You can also use Registry, to prevent automatic restarts when a user is signed in. Under **HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate\AU**, set **AuOptions** to **4** and enable **NoAutoRebootWithLoggedOnUsers**. As with Group Policy, if a user schedules the restart in the update notification, it will override this setting.
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For a detailed description of these regsitry keys, see [Registry keys used to manage restart](#registry-keys-used-to-manage-restart).
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## Configure active hours
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*Active hours* identify the period of time when you expect the device to be in use. Automatic restarts after an update will occur outside of the active hours.
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By default, active hours are from 8 AM to 5 PM on PCs and from 5 AM to 11 PM on phones. Users can change the active hours manually.
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Administrators can use multiple ways to set active hours for managed devices:
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- You can use Group Policy, as described in the procedure that follows.
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- You can use MDM, as described in [Configuring active hours with MDM](#configuring-active-hours-with-mdm).
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- While not recommended, you can also configure active hours, as descrbied in [Configuring active hours through Registry](#configuring-active-hours-through-registry).
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### Configuring active hours with Group Policy
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To configure active hours using Group Policy, go to **Computer Configuration\Administrative Templates\Windows Components\Windows Update** and open the **Turn off auto-restart for updates during active hours** policy setting. When the policy is enabled, you can set the start and end times for active hours.
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### Configuring active hours with MDM
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MDM uses the [Update/ActiveHoursStart and Update/ActiveHoursEnd](https://msdn.microsoft.com/library/windows/hardware/dn904962.aspx#Update_ActiveHoursEnd) settings in the [Policy CSP](https://msdn.microsoft.com/library/windows/hardware/dn904962.aspx) to configure active hours.
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### Configuring active hours through Registry
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This method is not recommended, and should only be used when neither Group Policy or MDM are available.
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Any settings configured through Registry may conflict with any existing configuration that uses any of the methods mentioned above.
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You should set a combination of the following registry values, in order to configure active hours.
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Under **HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate** use **SetActiveHours** to enable or disable active hours and **ActiveHoursStart**,**ActiveHoursEnd** to specify the range of active hours.
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For a detailed description of these regsitry keys, see [Registry keys used to manage restart](#registry-keys-used-to-manage-restart).
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>[!NOTE]
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>To configure active hours manually on a single device, go to **Settings** > **Update & security** > **Windows Update** and select **Change active hours**.
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>
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>
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## Limit restart delays
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After an update is installed, Windows 10 attemtps automatic restart outside of active hours. If the restart does not succeed after 7 days (by default), the user will see a notification that restart is required. You can use the **Specify deadline before auto-restart for update installation** policy to change the delay from 7 days to a number of days between 2 and 14.
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## Group Policy settings for restart
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In the Group Policy editor, you will see a number of policy settings that pertain to restart behavior in **Computer Configuration\Administrative Templates\Windows Components\Windows Update**. The following table shows which policies apply to Windows 10.
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| Policy | Applies to Windows 10 | Notes |
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| --- | --- | --- |
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| Turn off auto-restart for updates during active hours |  | Use this policy to configure active hours, during which the device will not be restarted. This policy has no effect if the **No auto-restart with logged on users for scheduled automatic updates installations** or **Always automatically restart at the scheduled time** policies are enabled. |
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| Always automatically restart at the scheduled time |  | Use this policy to configure a restart timer (between 15 and 180 minutes) that will start immediately after Windows Update installs important updates. This policy has no effect if the **No auto-restart with logged on users for scheduled automatic updates installations** policy is enabled. |
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| Specify deadline before auto-restart for update installation |  | Use this policy to specify how many days (between 2 and 14) an automatic restart can be delayed. This policy has no effect if the **No auto-restart with logged on users for scheduled automatic updates installations** or **Always automatically restart at the scheduled time** policies are enabled. |
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| No auto-restart with logged on users for scheduled automatic updates installations |  | Use this policy to prevent automatic restart when a user is logged on. This policy applies only when the **Configure Automatic Updates** policy is configured to perform scheduled installations of updates. <br>There is no equivalent MDM policy setting for Windows 10 Mobile. |
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| Re-prompt for restart with scheduled installations |  | |
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| Delay Restart for scheduled installations |  | |
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| Reschedule Automatic Updates scheduled installations |  | |
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>[!NOTE]
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>You can only choose one path for restart behavior.
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>
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>If you set conflicting restart policies, the actual restart behavior may not be what you expected.
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## Registry keys used to manage restart
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The following tables list registry values that correspond to the Group Policy settings for controlling restarts after updates in Windows 10.
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**HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate**
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| Registry key | Key type | Value |
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| --- | --- | --- |
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| ActiveHoursEnd | REG_DWORD | 0-23: set active hours to end at a specific hour</br>starts with 12 AM (0) and ends with 11 PM (23) |
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| ActiveHoursStart | REG_DWORD | 0-23: set active hours to start at a specific hour</br>starts with 12 AM (0) and ends with 11 PM (23) |
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| SetActiveHours | REG_DWORD | 0: disable automatic restart after updates outside of active hours</br>1: enable automatic restart after updates outside of active hours |
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**HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate\AU**
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| Registry key | Key type | Value |
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| --- | --- | --- |
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| AlwaysAutoRebootAtScheduledTime | REG_DWORD | 0: disable automatic reboot after update installation at scheduled time</br>1: enable automatic reboot after update installation at ascheduled time |
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| AlwaysAutoRebootAtScheduledTimeMinutes | REG_DWORD | 15-180: set automatic reboot to occur after given minutes |
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| AUOptions | REG_DWORD | 2: notify for download and automatically install updates</br>3: automatically download and notify for instllation of updates</br>4: Automatically download and schedule installation of updates</br>5: allow the local admin to configure these settings</br>**Note:** To configure restart behavior, set this value to **4** |
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| NoAutoRebootWithLoggedOnUsers | REG_DWORD | 0: disable do not reboot if users are logged on</br>1: do not reboot after an update installation if a user is logged on</br>**Note:** If disabled : Automatic Updates will notify the user that the computer will automatically restarts in 5 minutes to complete the installation |
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| ScheduledInstallTime | REG_DWORD | 0-23: schedule update installation time to a specific hour</br>starts with 12 AM (0) and ends with 11 PM (23) |
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There are 3 different registry combinations for controlling restart behavior:
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- To set active hours, **SetActiveHours** should be **1**, while **ActiveHoursStart** and **ActiveHoursEnd** should define the time range.
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- To schedule a specific instllation and reboot time, **AUOptions** should be **4**, **ScheduledInstallTime** should specify the installation time, **AlwaysAutoRebootAtScheduledTime** set to **1** and **AlwaysAutoRebootAtScheduledTimeMinutes** should specify number of minutes to wait before rebooting.
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- To delay rebooting if a user is logged on, **AUOptions** should be **4**, while **NoAutoRebootWithLoggedOnUsers** is set to **1**.
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## Related topics
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- [Update Windows 10 in the enterprise](waas-update-windows-10.md)
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- [Overview of Windows as a service](waas-overview.md)
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- [Manage updates for Windows 10 Mobile Enterprise and Windows 10 IoT Mobile](waas-mobile-updates.md)
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- [Configure Delivery Optimization for Windows 10 updates](waas-delivery-optimization.md)
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- [Configure BranchCache for Windows 10 updates](waas-branchcache.md)
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- [Configure Windows Update for Business](waas-configure-wufb.md)
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- [Integrate Windows Update for Business with management solutions](waas-integrate-wufb.md)
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- [Walkthrough: use Group Policy to configure Windows Update for Business](waas-wufb-group-policy.md)
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- [Walkthrough: use Intune to configure Windows Update for Business](waas-wufb-intune.md)
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