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KB5124006: Overview with user sentiment and feedback

Last Updated October 31, 2026

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Known Issues

Overview

KB5124006 is a non-security preview cumulative update (OS Build 28000.3086) for Windows 11, version 26H1, released September 22, 2026. It applies to all editions of Windows 11 26H1 and includes an SSU (KB5124005) plus AI component updates on Copilot+ PCs. Community data was not available in the provided input, so the assessment relies on the Microsoft release notes.

General Purpose

  • Taskbar can be positioned on any screen edge, and a smaller taskbar option is added.
  • Start menu gains small/large size options, a "Recent" rename, and a option to hide name and profile picture.
  • Windows Search adds a setting to toggle web and Store suggestions and auto-indexes frequently used folders.
  • Administrator protection (off by default) begins rolling out; Autopilot device association becomes generally available.
  • Fixes include a domain secure trust issue (Machine Identity Isolation), a File History false "Reconnect your drive" message, and VPN-related process hangs.
  • WMIC is scheduled for removal from Windows 11 26H1 starting September 2026.

General Sentiment

No substantive Reddit or windowslatest.com discussion was included in the provided data, so community reception could not be verified. Microsoft's own page lists several post-release known issues, which suggests the update has drawn some real-world problems. Treat the lack of community feedback as uncertainty rather than confirmation of stability.

Known Issues

  • Remote Desktop connections may fail for non-admin users with error 0xC000000D when Administrator protection is enabled on the host (fixed in KB5127653 and later).
  • Black screen or desktop loading issues after sign-in, mainly on AVD hosts using FSLogix (fixed in updates from October 13, 2026 onward).
  • USB Audio Class 1.0 devices may show Code 10 or produce no audio after the September 8, 2026 security update; no resolution yet.

Disclaimer: We take measures to ensure that AI-generated content is of the highest possible quality, but we cannot guarantee its accuracy and recommend that users do their own independent research. Generated on 2026-10-31 01:39 AM

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