KB5086672: Cumulative update for Windows 11, versions 24H2 and 25H2, March 2026. Setup error 0x80073712 fixed for March preview installs

Fixes error 0x80073712 that stopped some Windows 11 24H2 and 25H2 devices from installing the March preview update. It also carries forward quality improvements from earlier releases.

Does it affect you? Applies to: Devices running Windows 11, versions 25H2 or 24H2, on x64 or Arm64. The AI component updates apply only to Copilot+ PCs.

Review notes Additional details from the official release notes (2) Read notes

What changes On June 4, Microsoft corrected the x64 and Arm64 .msu update strings on the KB5086672 Catalog tab.
In detail Windows 11 24H2 Home and Pro updates end on October 13, 2026.

The official sources are linked at the end of the page.

What changes

Improvements 3 changes

Windows

Includes quality improvements carried forward from earlier updates.¹
The included improvements come from KB5079473, KB5085516, and KB5079391.

AI components

Verified in package

Copilot+ PCs receive updates to four AI components.²
Image Search, Content Extraction, Semantic Analysis, and Settings Model are updated to version 1.2603.377.0. These components do not install on other Windows PCs or Windows Server.

Servicing stack

The component that installs Windows updates receives quality improvements.³
Includes servicing stack update KB5079387, version 26100.8112.

Fix 1 change

Setup

Some devices can install the March preview update without encountering error 0x80073712.⁴
Fixes an installation issue affecting Windows 11, versions 25H2 and 24H2, when installing KB5079391.

Technical details

Data sheet · Security · Downloads · Components Click to collapse or expand

Data sheet

Released: 2026-03-31
Classification: Updates
Type: Cumulative update
Restart: Required
Replaces: KB5079391, KB5085516, KB5079473, KB5077241

+47 earlier
KB5077181, KB5074105, KB5078127, KB5077744, KB5074109, KB5072033, KB5070311, KB5068861, KB5067036, KB5070773, KB5066835, KB5065789, KB5068221, KB5065426, KB5064081, KB5063878, KB5062660, KB5064489, KB5062553, KB5060829, KB5063060, KB5060842, KB5058499, KB5061977, KB5058411, KB5055627, KB5059087, KB5055523, KB5053656, KB5053598, KB5052093, KB5051987, KB5050094, KB5050009, KB5048667, KB5046740, KB5046617, KB5044384, KB5044284, KB5043178, KB5043080, KB5041865, KB5041571, KB5040529, KB5040435, KB5039304, KB5039239
Replaced by: KB5083769

Version	Build	Channel
24H2	26100.8117	General availability
25H2	26200.8117	General availability

Security

No vulnerabilities are listed for this update.

Downloads (Microsoft Update Catalog)

x64 24H2

5.0 GB

windows11.0-kb5086672-x64.msu Main update · KB5086672 SHA-1: 97df4ed2…0fd346 windows11.0-kb5043080-x64.msu Prerequisite · KB5043080 SHA-1: 95344967…9c83e8

Arm64 24H2

4.5 GB

windows11.0-kb5086672-arm64.msu Main update · KB5086672 SHA-1: ec8e6985…7e59b0 windows11.0-kb5043080-arm64.msu Prerequisite · KB5043080 SHA-1: df540a05…0f090b

x64 25H2

5.0 GB

windows11.0-kb5086672-x64.msu Main update · KB5086672 SHA-1: 97df4ed2…0fd346 windows11.0-kb5043080-x64.msu Prerequisite · KB5043080 SHA-1: 95344967…9c83e8

Arm64 25H2

4.5 GB

windows11.0-kb5086672-arm64.msu Main update · KB5086672 SHA-1: ec8e6985…7e59b0 windows11.0-kb5043080-arm64.msu Prerequisite · KB5043080 SHA-1: df540a05…0f090b

Updated components

1,195 files changed since the previous update for the same versions.

Top changed components	Files
Graphics and display	4
Hyper-V and virtualization	3
Kernel	3
Printing	3
Audio	2
File Explorer and shell	2
Networking	2
Secure Boot	2
Settings	2
Remote Desktop	1

Verified in package: changed files confirm AI components.

Sources

Microsoft Support: KB5086672

Updated Oct 26, 2026

Cited passages from Microsoft's official notes (4)

1. 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). support.microsoft.com
2. This latest cumulative update includes updates for AI components. Even though the AI component updates are included in the update, the AI components are only applicable to Windows Copilot+ PCs and will not install on Windows PC or Windows Server. support.microsoft.com
3. This update makes quality improvements to the servicing stack, which is the component that installs Windows updates. support.microsoft.com
4. along with a fix for an installation issue that affected some devices attempting to install that update. support.microsoft.com

Checked automatically: 8 of 8 checks passed, 4 quoted passages · compared with Microsoft's page on Oct 20, 2026

Quotes found in the official pages: passed
Numbers found in the sources: passed
Vulnerabilities from the dossier only: passed
Links to allowed domains only: passed
Every official change covered: passed
Readable plain text: passed
Changes confirmed by the file list: passed
Sources agree: passed

A second AI read the text against the sources: correctness 4/5, clarity 4/5, completeness 3/5. How we work

Published by The Update Bureau. Written with AI from Microsoft's own documents, checked by rules and a second AI. How we work · Report a mistake