Insider KB5124010 Windows 11 Insider RP build 26100.9539 (24H2), 26200.9539 (25H2), and 26300.9539 (26H2) - Sept. 10

Hello Windows Insiders,

These release notes are for Windows 11 Builds 26100.9539, 26200.9539 and 26300.9539 (KB5124010) in the Release Preview Channel on Windows 11, versions 24H2 (Build 26100), 25H2 (Build 26200) and 26H2 (Build 26300).

This update is available through two release phases: gradual rollout and normal rollout. A gradual rollout  delivers an update in phases, so features reach devices over time instead of all at once, meaning availability varies by device. A normal rollout  is the broad release to all eligible devices at the same time, usually when it reaches general availability (GA).

Gradual rollout

This section highlights some new features and enhancements for Windows 11 PCs, including AI-powered capabilities, continuous innovation, and performance improvements.

File Explorer

• New! This update adjusts how the preview pane handles files downloaded from the web. For HTML files, a new Preview anyway button lets you acknowledge the warning and preview the file. Non-HTML files, such as PDFs, are now previewed automatically.
• New! File Explorer Home now preserves the state of sections (expanded or collapsed), so you can pick up where you left off.
• New! This update improves the reliability of thumbnail previews for cloud files in the Details pane. The pane has also been reorganized so file properties are easier to find and review at a glance.
• New! The update addresses an issue that could clear the address bar contents when entering edit mode by clicking near the right side of the address bar.

Emoji

• New! This update adds support for Emoji 17.0, including new emoji such as distorted face, fight cloud, and hairy creature. To insert them, press the Windows key + Period (.) to open the emoji panel.
• New! This update also refines the design of several existing emoji for better consistency across platforms, including saluting face, face with peeking eye, goose, lotus, and kissing cat.
  
  
  

  Open Emoji Panel in Windows 11

  This tutorial will show you how to open the Emoji Panel in Windows 11. An emoji is a pictogram, logogram, ideogram or smiley embedded in text. Windows 11 includes 3D Fluent emoji you can use from the Emoji Panel. Starting with Windows 11 build 22631.3810, Microsoft is adding support for Emoji...

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Widgets

• New! This update introduces the Tips widget, which provides short, helpful guidance about Windows features. To add it to your Widgets board, open the board, select Add widgets, and then choose Tips. To add it to your lock screen, go to Settings > Personalization > Lock screen and add Tips to your lock screen widgets.
  
  
  

  Add or Remove Widgets on Widgets Board in Windows 11

  This tutorial will show you how to add (pin) or remove (unpin) widgets on the Widgets board for your account in Windows 11. Widgets in Windows are interactive elements that display dynamic content and provide quick access to various apps and features. You can view your location's current...

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  Add and Remove Widgets on Lock Screen in Windows 11

  This tutorial will show you how to add and remove widgets on the lock screen for your account in Windows 11. You can stay informed and efficient with dynamic updates that bring weather, finance, sports, traffic, and app notifications right to your lock screen. Starting with Windows 11 build...

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Personalization

• This update includes a variety of improvements to desktop background experiences.
• This update improves the reliability of the Personalization > Background page in Settings.
• This update adds support for using DIB image files as desktop backgrounds.
• This update improves reliability of desktop slideshow transitions on newly created accounts.
• This update improves resolution of previews when selecting a desktop background in Personalization > Background.
• This update improves desktop background preview display in Settings for users with portrait mode monitors.
• This update improves reliability of processing desktop wallpaper changes when they happen in quick succession.
• This update adds support for using slideshow wallpapers with multiple desktops, so that it won’t automatically switch you back to Picture.
  
  
  

  Change Desktop Background to Spotlight, Picture, Solid Color, or Slideshow in Windows 11

  This tutorial will show you different ways to change the desktop background to a picture, solid color, slideshow, or Windows Spotlight image for your account in Windows 11. You can change your desktop background in Windows 11 to be a picture, solid color, a slideshow, or Windows Spotlight...

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Bluetooth

• This update contains several enhancements to improve reliability and experience when connecting to and using Bluetooth devices:
• During voice calls, the Windows shell volume flyout now appears when adjusting the volume of a Bluetooth Classic Audio accessory via the volume controls on the accessory, providing visual feedback of the new volume level.
• This update improves the accuracy of the connection state displayed by Windows for accessories that have disconnected from the PC.
• This update improves stability of the Bluetooth and devices page in Settings when managing Bluetooth and audio devices.
• This update resolves an issue where the Bluetooth radio could be turned off, but the state of the radio control toggle in the Bluetooth and devices page in Settings shows as on.
• This update improves Bluetooth audio stability and compatibility.
• This update improves microphone compatibility with certain Bluetooth Classic audio accessories.
• This update resolves an issue that could result in a crash (error code 0x139) while streaming Bluetooth audio.
• This update improves reliability and performance with LE Audio accessories.
• This update improves the reliability of shared audio.

Accessibility

• New! This update introduces Open apps maximized, an accessibility setting that automatically maximizes app windows as they open. It removes a bit of everyday friction whether you use a screen reader or magnification, work in tablet mode, or simply prefer a consistent, full-screen workspace. To turn it on, go to Settings > Accessibility > Visual effects and turn on Open apps maximized.
  
  
  

  Enable or Disable Open Apps Maximized by Default in Windows 11

  This tutorial will show you how to turn on or off always open apps maximized by default for your account in Windows 11. You can manually maximize an app window in Windows 11 to "fit to screen" or "fill the screen" with the window. Starting with Windows 11 build 26340.9233 (Experimental 26H2)...

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• This update improves navigation of the Bluetooth quick settings page when using keyboard input, gamepad input, or Narrator.

Magnifier

• New! This update brings a modernized visual refresh to the Magnifier taskbar.
• Updated icons. Magnifier’s toolbar icons align with Windows 11 visual design, giving the tool a cleaner, more modernized feel.
• Refined spacing and padding. The padding is adjusted with spacing across the toolbar for a more polished, consistent layout.
• Views, zoom controls, keyboard shortcuts, and Read Aloud all behave exactly as they did in earlier versions.

Settings

• This update improves the reliability of Settings when interacting with the contents of the Settings > Bluetooth & Devices > Printers & Scanners page.
• This update updates Settings > Apps > Installed apps to show the version number at the top level for packaged apps, as it already does for other apps.
  
  
  

  Find Version of Installed Apps in Windows 11

  This tutorial will show you how to find the current version of installed apps in Windows 11. Option One: Find Version of Installed Apps in Settings Option Two: Find Version of Installed Apps in Control Panel Option Three: Find Version of Installed Apps in Microsoft Store Option Four: Find...

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• This update improves the time picker control in Settings so that it reflects your preferred time format when you switch between 12-hour and 24-hour. This applies in places such as setting active hours and scheduling night light.
• This update improves persistence of the Allow multiple apps to use camera at the same time option in Settings > Bluetooth & Devices > Camera settings.
  
  
  

  Enable or Disable Multiple Apps to Use Camera in Windows 11

  This tutorial will show you how to turn on or off allowing multiple apps to use camera at the same time for your account or all users in Windows 11. Starting with build 26100.8524 (24H2), build 26200.8524 (25H2), and build 28000.2340 (26H1), Microsoft added a new Advanced camera options section...

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Touchpad

• New! Additional gesture controls for precision touchpads are available in Settings > Bluetooth & devices > Touchpad:
• Single-finger scrolling — Scroll vertically with one finger starting from the left or right side of the touchpad.
  
  
  

  Disable or Change Single-finger Scrolling Side on Touchpad in Windows 11

  This tutorial will show you how to start vertical scrolling with a single-finder near the left or right side of the touchpad for your account in Windows 11. Starting with Windows 11 build 26300.8376 (Experimental) for Insiders, Microsoft is adding new gesturing-related functionality to...

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• Automatic scrolling — Keep scrolling without lifting your fingers by moving them near the edge of your touchpad while scrolling.
  
  
  

  Turn On or Off Automatic Scrolling with Pressure on Touchpad in Windows 11

  This tutorial will show you how to turn on or off automatic scrolling with pressure on the touchpad for your account in Windows 11. Starting with Windows 11 build 26300.8376 (Experimental), Microsoft is adding new gesturing-related functionality to precision touchpads in Settings. The new...

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  Turn On or Off Automatic Scrolling at Edge on Touchpad in Windows 11

  This tutorial will show you how to turn on or off automatic scrolling at edge on the touchpad for your account in Windows 11. Starting with Windows 11 build 26300.8376 (Experimental), Microsoft is adding new gesturing-related functionality to precision touchpads in Settings. The new features...

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• Previously, gesture controls for scroll and zoom speed and accelerate scrolling were released in the July 2026 update (KB5101684).
  
  
  

  Change Touchpad Scroll Speed in Windows 11

  This tutorial will show you how to change touchpad scroll speed for your account in Windows 11. Starting with Windows 11 build 26100.8973 (24H2), build 26200.8973 (25H2), and build 28000.2804 (26H1), Microsoft is adding new gesturing-related functionality to precision touchpads in Settings. The...

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  Change Touchpad Zoom Speed in Windows 11

  This tutorial will show you how to change touchpad zoom speed for your account in Windows 11. Starting with Windows 11 build 26100.8973 (24H2), build 26200.8973 (25H2), and build 28000.2804 (26H1), Microsoft is adding new gesturing-related functionality to precision touchpads in Settings. The...

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  Turn On or Off Accelerated Scrolling on Touchpad in Windows 11

  This tutorial will show you how to turn on or off accelerated scrolling on the touchpad for your account in Windows 11. Starting with Windows 11 build 26100.8973 (24H2), build 26200.8973 (25H2), and build 28000.2804 (26H1), Microsoft is adding new gesturing-related functionality to precision...

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Copilot key

• New! This update introduces a new Windows 11 setting that lets you remap the Copilot key to function as the Right Ctrl or Context Menu key, helping preserve familiar keyboard shortcuts and accessibility workflows. For more information, see Understand updates to the Copilot key on Windows devices.
  
  
  

  Customize what Copilot Key on Keyboard or Win+C Opens in Windows 11

  This tutorial will show you how to change (remap) the action or which app opens when you press the hardware Copilot key or Windows :win: + C keys for your account or all users in Windows 11. If you have a Windows 11 Copilot+ PC, it will have a Copilot key on the keyboard. When you press this...

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Cameral roll

• New! This update introduces Camera roll backup in Settings, helping eligible users protect their photos with OneDrive. You can turn on the feature from the Settings Home or Accounts page and complete setup on their mobile phone using a QR code. 1

Fonts

• New! This update adds support for the Garay and Beria Erfe scripts to the Ebrima font, the first Microsoft font to support both. Garay was encoded in Unicode 16.0 and Beria Erfe in Unicode 17.0.
• New! This update also refines the Adlam glyph designs in Ebrima to align with the current Unicode standard and improve consistency.

Windows Recovery (WinRE)

• New! This update enables WinRE to automatically reuse eligible Wi-Fi profiles already saved in Windows, including supported certificate-based networks. Devices can now get online automatically during recovery scenarios such as quick machine recovery or cloud rebuild, without preconfiguring Wi-Fi credentials in WinRE. This capability is on by default, and IT admins can disable it. For more information, see Windows Recovery Environment (Windows RE).
• New! This update adds recovery remote management plug-in for extending WinRE management capabilities for MDM providers. For more information, see Recovery Remote Management Overview.

Kiosk mode

• The Windows key plus Tab keyboard shortcut is now disabled when using a restricted UX kiosk.
• The Windows key plus A and Windows key plus C keyboard shortcuts are now disabled when using single app kiosk mode.

Windows Backup 

• PC-to-PC Migration is no longer available. This feature, introduced through a phased rollout, previously allowed you to transfer files and settings directly from your previous PC when setting up a new Windows PC. To back up and restore your files, settings, and other supported items when moving to a new PC, use Windows Backup. For more information, see Back up and restore with Windows Backup.
  
  
  

  Transfer Files and Settings to New Windows 11 PC using Windows Backup app

  This tutorial will show you how to transfer your files, settings, and preferences from your previous (old) Windows 10/11 PC to your new Windows 11 PC during Windows Setup. The Windows Backup app includes a PC to PC migration experience to Transfer to a new PC. When you're setting up your new...

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1 Feature availability depends on your device and market.





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