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Update Summary

KB5079391 updates Windows 11 version 25H2 and 24H2 with quality improvements, new features, and fixes. It was later paused for new devices due to an installation issue; KB5086672 addresses that problem and includes these improvements. Reference IDs: KB5079387.

Update Details

Security

  • Smart App Control can now be turned on or off without a clean install, helping block untrusted or potentially harmful apps.
  • Windows Secure Boot certificate expiration guidance is highlighted to help prevent future secure boot disruption.

Bug Fixes

  • Fixes a Windows Update Standalone Installer issue where .msu installs might fail with ERROR_BAD_PATHNAME.
  • Improves File Explorer reliability, including unblocking downloaded files for preview and sorting folder permission entries by Principal.
  • Improves Settings reliability and performance, including opening Home and downloading required updates in Advanced settings.
  • Improves display reliability, including refresh rates above 1000 Hz, USB4 monitor sleep power behavior, auto-rotation after sleep, HDR reliability, and WMI monitor size reporting.
  • Improves Windows Hello fingerprint reliability for certain devices.
  • Improves safe mode taskbar component loading reliability.
  • Improves Voice Access number detection and writing in English.
  • Improves Windows Recovery Environment stability for x64 apps on ARM64 devices.
  • Fixes an extraneous error message when running sfc /scannow.
  • Improves Application ID tagging reliability in Application Control for Business policies.
  • Improves Narrator Natural Voices experience and setup reliability.
  • Improves handling of short MIDI messages when apps are initialized without long message buffers.
  • Improves Start menu layout application through Group Policy when desktopAppLink is present in JSON.
  • Adds support for DisableSeamlessLanguageBar in Set-RDSessionCollectionConfiguration.

New Features

  • Narrator now provides rich image descriptions on Copilot+ PCs and works with Copilot on all Windows 11 devices.
  • Microsoft 365 Family subscribers can upgrade to a different Microsoft 365 plan from Settings > Accounts.
  • Settings > Accounts > Other users dialog boxes now match the modern Windows look and support dark mode.
  • The Pen settings page now includes a Same as Copilot key option for the pen tail button.
  • The Settings About page and Settings Home device information card have been redesigned for clearer device details and navigation.

Known Issues

  • Installation of this update might fail with error 0x80073712.
  • The update was no longer being offered to new devices after an installation issue was identified.

Hints

  • This update is a non-security preview release for Windows 11 version 25H2 and 24H2.
  • A newer out-of-band update, KB5086672, includes these improvements and fixes the installation issue.
  • The update is available in gradual rollout and normal rollout phases.
  • Updated downlevel baseline support for printer connections is Windows 10 version 1607 and Windows Server 2016 (Build 14393).
  • AI component versions were updated to 1.2603.377.0 for Image Search, Content Extraction, Semantic Analysis, and Settings Model.
  • Windows 11 servicing stack update KB5079387 is included at version 26100.8112.
Product Information

Vendor: Microsoft

Product: Windows 11

Version: OS Builds 26200.8116 and 26100.8116

Release date: Mar 26, 2026