On computers running the RTM release of Windows 8 and Windows Server 2012, Windows Update no longer defined when to install updates. Instead, Automatic Maintenance is used for that purpose, minimizing activity during active computer use. Windows Update on Windows 8 and Windows Server 2012 computers also has new restart logic that defaults to forcing a restart 3 days after the installation of updates instead of 15 minutes. To avoid unintended data loss, forced restarts also no longer occur if a user is not actively using the machine, able to see the restart notice, and save their work.
While these changes have proven to be beneficial to many end users, the lack of discrete control over Windows Update installations and system restarts disrupted some management scenarios. This update returns the ability to discretely control when Windows Update installs updates, and adds the capability to force a restart soon after those installations regardless of whether there might be an active user session.
Microsoft has updated the documentation to more fully explain how you can use these new group policy settings. This documentation is available here: http://support.microsoft.com/kb/2885694
KB2885694, included in update rollup KB2883201, is available today (October 8th, 2013) on Windows Update and the Microsoft Update Catalog, and will be available soon on WSUS. We believe that this update will result in significantly improved uptime, reliability, and manageability; we hope you’ll agree.
In order for the below changes to take effect, this update must be installed on all client computers receiving the desired configuration. It should also be installed on the computers configuring the policy to expose the new and updated group policies.
Finally, these updates are already included in the final versions of Windows 8.1 and Windows Server 2012 R2, so if you are already planning to upgrade, there aren’t any additional updates you need to install.
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Changes introduced by this update
KB 2885694 introduces two main changes that define how Windows Update on Windows 8 and Windows Server 2012 computers can be configured using group policy. All policies mentioned are located at this path:
Computer Configuration / Administrative Templates / Windows Components / Windows Update
When enabled with a value of 4…
The Configure Automatic Updates group policy works identically to the Windows 7 / Windows Server 2008 R2 and earlier behavior.
On Windows 8 and Windows Server 2012 without KB 2885694 installed, that policy could configure the main automatic updating setting, but configuring the scheduled install day and time had no effect. After installing KB 2885694, the policy will enable you to configure machines to:
- Install updates during automatic maintenance, the default behavior, or
- Install updates at the scheduled day and time defined in the policy
A new group policy called Always automatically restart at the scheduled time enables restarts soon after updates are installed, instead of 3 days later
By default in Windows 8 and Windows Server 2012, if the installation of important updates requires a system restart, one will be forced 3 days after their installation. The restart timer begins counting down only when a user is able to see it, helping prevent unintentional data loss in the middle of the night. More details about this default behavior are discussed in this blog post.
If you would instead like to force restarts following update installation, similar to Windows 7 / Windows Server 2008 R2 and earlier, you can enable the new “Always automatically restart…” policy. When the policy is enabled, a restart timer will always begin immediately after Windows Update installs important updates, instead of multiple days later.
The restart timer cannot be postponed once started, but the policy lets you configure the countdown timer to any value between 15 and 180 minutes. When the timer runs out, the restart will proceed even if the machine has signed-in users.
Note: If the group policy No auto-restart with logged on users for scheduled automatic updates installations is enabled, then the new “Always automatically restart…” policy has no effect.
Note: In Windows 8 and Windows Server 2012, the Delay Restart for scheduled installations continues to have no effect.
Force updates and restarts at a specific time. For example:
Use the Configure Automatic Updates policy:
Use the Always automatically restart at the scheduled time policy:
Stagger installs and restarts across different hours and days on different machines.
Start with the same configuration as the above scenario.
Set different scheduled install days and times for different groups which you don’t want rebooting at the same time.
Force updates at a specific day and time, but preserve the default Windows 8 restart behavior
Start with the same configuration as the above scenarios, but do not enable the Always automatically restart at the scheduled time policy.
This post was written by Jordan Cohen on behalf of the Windows Update team.