Insider KB5124038 Windows 11 Insider Experimental (26H2) build 26340.9212 - Aug. 17

Changes and improvements gradually being rolled out​

[File Explorer]​

• Introducing the new, redesigned context menu in File Explorer
  • We're beginning to roll out an updated context menu experience in File Explorer, designed to feel faster, cleaner, and easier to tailor to the way you work. The new design reduces top-level clutter, keeps commonly used actions easy to access, and adds a new Settings experience that gives you more control over what appears in the menu. As we continue refining this experience with Insider feedback, our goal is to make right-click feel more responsive, predictable, and personal.
    
    
    

    Customize Context Menu in File Explorer on Windows 11

    This tutorial will show you how to customize what appears in the context menu in File Explorer for your account in Windows 11. A context menu is a graphical user interface (GUI) that appears when you right click or press and hold on an item (ex: desktop, file, folder, drive, etc...) in Windows...

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    Improving File Explorer and Context Menu in Windows 11: faster, simpler, and more customizable

    Windows Blogs: Hi Windows Insiders, File Explorer is one of the most used experiences on Windows. It’s where you get work done: organizing files, finding what you need, and moving content seamlessly across local storage and the cloud. Earlier this year, we shared our commitment to improving...

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    Screenshot of new context menu
• Previewing images in File Explorer
  • Fixed an issue from the previous flight where previews in File Explorer showed an unexpected thick band across the middle.

[Camera Roll Backup]​

• New entry points on the Settings > Home and Accounts pages help you set up Camera Roll Backup and automatically back up photos and videos from your mobile device to OneDrive.
  
  
  
  UI showing the Phone photo back-up setting in Cloud storage with the status "Not backed up" and link to begin backup process

[Windows Management Instrumentation Command-line (WMIC) removal]​

• Windows Management Instrumentation Command-line (WMIC) has been removed in this release. This change is part of the ongoing deprecation and removal of WMIC from Windows.
• For more information about this change, see Windows Management Instrumentation Command-line (WMIC) removal from Windows.
  
  
  

  Add or Remove WMIC command Feature in Windows 11

  This tutorial will show you how to add or remove the WMIC command as an optional feature for all users in Windows 11. The WMI command-line (WMIC) utility provides a command-line interface for Windows Management Instrumentation (WMI). WMIC is compatible with existing shells and utility commands...

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[Emoji]​

• We're adding support for Emoji 17.0. This includes new emoji such as distorted face, fight cloud, and hairy creature. To try the new emoji, press the Windows key plus Period (.) to open the emoji panel and insert them from there.
  
  
  

  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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• As part of this effort, we've also made some slight adjustments to the design of some of our current emoji to improve consistency across platforms. This includes the saluting face, face with peeking eye, goose, lotus, and kissing cat emoji.
  
  

[Get Started app]​

• The Get Started app is updated with new pages. The pages help personalize your device and discover new features. Pages might depend on your device. Close the flow at any time, or revisit it by opening Get Started. The new pages include the app install page, the site pinning page, and the personalized theme page.
  
  
  App install page in Get Started
  
  
  Site pinning page in Get Started
  
  
  Theme page in Get Started

[Magnifier]​

• We're giving Magnifier's toolbar a modernized visual refresh.
• Updated icons. We've updated Magnifier's toolbar icons to align with Windows 11 visual design, giving the tool a cleaner, more modernized feel.
• Refined spacing and padding. We've adjusted the padding and spacing across the toolbar for a more polished, consistent layout.
• What's not changing: The way Magnifier works. Your views, zoom controls, keyboard shortcuts, and Read Aloud all behave exactly as they did in earlier versions.
  
  
  UI showing updated icons and more polished, consistent layout.

[Drag Tray]​

• Thank you to Insiders who have provided feedback about the Drag Tray experience. Based on feedback, we're removing the experience in this build. We're continuing to explore improvements in this area and look forward to sharing more about a future replacement experience in a later update.
  
  
  

  Enable or Disable Drop Tray in Windows 11

  This tutorial will show you how to enable or disable the Drag/Drop Tray feature for your account in Windows 11. Starting with Windows 11 build 26100.4202 (24H2) and build 22631.5413 (23H2), sharing files in Windows is getting a lot easier and quicker with the Drag Tray feature. When you start...

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[Input]​

• Fixed an issue where some third-party keyboard input methods, including certain Chinese IMEs, might not display their status window correctly when typing in File Explorer and other parts of Windows.
• Improved reliability of typing with the Japanese IME by reducing potential hangs and deadlocks.

[Start menu]​

• We're adjusting the rollout population for the personalized Start menu, so some Insiders might see the features temporarily disappear. If you don't see the feature in this build, you can re-enable it through feature flags.

[Run]​

• For Insiders using the modern Run dialog:
  • Improved first launch reliability.
  • Adjusted verbosity for screen reader users.
    
    
    

    Enable or Disable Modern Run Dialog in Windows 11

    This tutorial will show you how to enable or disable using the modern Run dialog when pressing the Win+R keys for your account in Windows 11. The Run dialog allows you to type the name of a command, program, folder, document, or internet resource to open or run in Windows. Starting with...

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[Personalization]​

• We're starting to roll out a variety of improvements to desktop background experiences. These improvements include:
  • Improved reliability of the Personalization > Background page in Settings.
  • Added support for using DIB image files as desktop backgrounds.
  • Improved reliability of desktop slideshow transitions on newly created accounts.
  • Improved the resolution of previews when selecting a desktop background in Personalization > Background.
  • Improved the desktop background preview display in Settings for users with portrait mode monitors.
  • Improved reliability of processing desktop wallpaper changes when they happen in quick succession.
  • Added support for using slideshow wallpapers with multiple desktops so that it won't automatically switch you back to Picture.

[Settings]​

• Fixed an issue causing Settings to crash in the previous flight when interacting with items on the Date & Time page.

[Other]​

• Fixed an xtajit64.dll crash, which was leading to issues with certain apps for Insiders on Arm64 PCs in the latest flights.

Reminders for Windows Insiders in the Experimental channel​

• Updates are based on Windows 11, version 26H2 via an enablement package (Build 26340.9212).
• Many features are rolled out using Controlled Feature Rollout technology, starting with a subset of Insiders and ramping up over time. We monitor feedback to see how they land before pushing them out to everyone in this channel.
• The desktop watermark shown at the lower right corner of the desktop is normal for Windows Insider pre-release builds.
• Features and experiences included in these builds might never get released as we try out different concepts and get feedback. Features might change over time, be removed, or replaced and never get released beyond Windows Insiders. Some of these features and experiences could show up in future Windows releases when they're ready.
• Some features in active development we preview with Windows Insiders might not be fully localized, and localization will happen over time as features are finalized. As you see issues with localization in your language, report those issues to us via Feedback Hub.
• Check out Flight Hub for a complete look at what build is in which Insider channel.

Windows 11 Insider Experimental Preview Build 26340.9212 - Windows Insider Program

Release notes for Windows 11 Insider Experimental Preview Build 26340.9212

learn.microsoft.com

Announcing new builds for 17 August 2026

Hello Windows Insiders, Today, we’re releasing new Windows 11 Insider Preview builds to the Beta and Experimental Channels. This post also includes reminders about renewed flight certificates and the current Feature Flags settings issue in the Exp

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UUP Dump is the most practical and easy way to get ISO images of any Insider Windows 10 or Windows 11 version, as soon as Microsoft has released a new build. UUP Dump creates a download configuration file according to your choices, downloads necessary files directly from Microsoft servers, and...

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