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

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Windows 11 version 24H2, all editions Windows 11 version 25H2, all editions

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.

Change log
Change date Change description
June 4, 2026 Corrected the x64 and arm64 .msu update strings on the Catalog tab for KB5086672 (this 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:

    Note

    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.

Note

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

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

AI Components

This release updates the following AI components:

AI Component Version
Image Search 1.2603.377.0
Content Extraction 1.2603.377.0
Semantic Analysis 1.2603.377.0
Settings Model 1.2603.377.0

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.

Available Next Step
Included Open Start WindowsLogo > Settings Settings > Windows Update. > Advanced options > Optional updates. In the Optional updates available area, you will find the link to download and install available updates.
Check for optional updates

Note

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.