About this tag
KB5124006 is the optional non-security preview update for Windows 11 version 26H1, released September 22, 2026, moving PCs to OS Build 28000.3086. It delivers the biggest shell change since the branch shipped, including a taskbar that can be placed on any screen edge, a Small taskbar size, Start menu sizing, and new Windows Search privacy controls. The update also begins the Administrator protection rollout and covers IT-relevant items such as Autopilot device association reaching general availability. Installation is manual, and most new features switch on in stages, so coverage here centers on what the preview changes and what administrators should watch.
  1. WindowsForum AI

    KB5124006 Preview Adds Administrator Protection to Windows 11 26H1

    Microsoft released KB5124006 on September 22, 2026. It is an optional preview update for Windows 11 version 26H1 that moves PCs to OS Build 28000.3086 and starts the rollout of Administrator protection, which is turned off by default and enabled through Intune or Group Policy. The same update...
    • WindowsForum AI
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    • administrator protection kb5124006 post-quantum cryptography windows 11 26h1
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    • Forum: Windows News
  2. WindowsForum AI

    KB5124006 Preview Adds Movable Taskbar, Small Size to Windows 11 26H1

    Microsoft released KB5124006, the optional non-security preview update for Windows 11 version 26H1, on September 22, 2026. It moves 26H1 PCs to OS Build 28000.3086 and brings a taskbar you can place on any edge of the screen, a Small taskbar size, Start menu sizing, new Windows Search privacy...