Win Update KB5086672 Windows 11 Out-of-band Update build 26100.8117 (24H2) and 26200.8117 (25H2) - March 31

UPDATE 4/14:

March 31, 2026 - KB5086672 (OS Builds 26200.8117 and 26100.8117) Out-of-band​

This out-of-band update for Windows 11, version 25H2 and 24H2 (KB5086672) is cumulative and includes updates from previous security and non-security releases.

This update includes the improvements and features that were introduced in the March 26, 2026 non-security preview update (KB5079391), along with a fix for an installation issue that affected some devices attempting to install that update.

Improvements​

This out-of-band update contains quality improvements from KB5079473 (released March 10, 2026), KB5085516 (released March 21, 2026), and KB5079391 (released March 26, 2026 - no longer offered). The following summary outlines key issues addressed by this out-of-band update. The bold text within the brackets indicates the item or area of the change.

• [Setup] Fixed: While installing the March 2026 Windows preview update (KB5079391), some devices running Windows 11, version 25H2 or 24H2, might encounter the following error:
  
  Some update files are missing or have problems. We'll try to download the update again later. Error code: (0x80073712)

This out-of-band update is offered through Windows Update for devices running Windows 11 that have already installed KB5079473 or a later update. It is also available for manual download from the Microsoft Update Catalog.

Devices that have Get the latest updates as soon as they’re available turned on may see this update offered automatically through Windows Update when it becomes available for their device. If this setting is turned off, you can install the update manually by going to Settings > Windows Update and selecting Download & install.

Note: IT administrators using Microsoft Intune or Windows Autopatch should follow the guidance below for installing the out-of-band update via Windows Update.

• Expedite Windows quality updates in Microsoft Intune
• Deploy an expedited quality update using Windows Autopatch

AI Components​

This release updates the following AI components:

Windows 11 servicing stack update (KB5079387)- 26100.8112​

This update makes quality improvements to the servicing stack, which is the component that installs Windows updates. Servicing stack updates (SSU) ensure that you have a robust and reliable servicing stack so that your devices can receive and install Microsoft updates. To learn more about SSUs, see Simplifying on-premises deployment of servicing stack updates.

Known issues in this update​

Microsoft is not currently aware of any issues with this update.

How to get this update​

Before you install this update

Microsoft combines the latest servicing stack update (SSU) for your operating system with the latest cumulative update (LCU). For general information about SSUs, see Servicing stack updates.

Install this update

To install this update, use one of the following Windows and Microsoft release channels.


If you want to remove the LCU

Before you decide to remove the LCU, see Understanding the risks: Why you should not uninstall security updates.

To remove the LCU after installing the combined SSU and LCU package, use the DISM/Remove-Package command line option with the LCU package name as the argument. You can find the package name by using this command: DISM /online /get-packages.

Running Windows Update Standalone Installer (wusa.exe) with the /uninstall switch on the combined package will not work because the combined package contains the SSU. You cannot remove the SSU from the system after installation.

File information

For a list of the files provided in this update, download the file information for out-of-band update 5086672.

For a list of the files provided in the servicing stack update, download the file information for the SSU (KB5079387) - version 26100.8112.





Check Windows Updates


UUP Dump:

64-bit ISO download:

ARM64 ISO download: