Insider KB5127933 Windows 11 Insider Experimental (26H1) build 28120.3393 - Oct. 30



 Microsoft Support:

Changes and improvements gradually being rolled out*​

  • This update includes a small set of general improvements and fixes that improve the overall experience for Insiders running this build on their PCs.

[Windows Search]​

  • We're expanding the new Windows Search experience that began rolling out earlier this month with more ways to find what you need and take action directly from Search.

  • Inline actions: Adjust your volume, screen brightness, or cursor size with inline sliders. Actions are more clearly labeled, and suggested actions help you discover more things you can do.

    Screenshot that shows a slider control appearing in inline action results, allowing the setting to be adjusted directly from Windows Search.
    A slider control appears in inline action results, allowing the setting to be adjusted directly from Windows Search.
  • Phone actions: With a supported phone connected through Phone Link, you can now call or text a friend and access phone actions such as Do Not Disturb. Android support is available now with iPhone support coming early next year.

    Screenshot that shows three Windows Search views showing phone actions for turning on Do Not Disturb, sending a text message, and making a call from a connected phone.
    Three Windows Search views show phone actions for turning on Do Not Disturb, sending a text message, and making a call from a connected phone.
  • Richer results: Preview files and see details such as a file's last modified date, location, and author. Get web answers for weather, stocks, and facts, and discover apps and games from the Microsoft Store. Like web results, app results from the Store can be toggled on or off in Settings > Privacy & security > Search.


    Screenshot that shows three Windows Search views showing inline previews of a PowerPoint presentation, a Word document, and a stock price.
    Three Windows Search views show inline previews of a PowerPoint presentation, a Word document, and a stock price.
  • Result filters: Scroll to see more results and filter by Files & Folders, Settings, Actions, and more.

    Screenshot that shows two views of Windows Search showing a search for outlook with additional options to filter and find results.
    Two views of Windows Search show a search for "outlook" with additional options to filter and find results.
  • Feedback controls: Right-click a result or suggestion and choose thumbs up or thumbs down to tell us whether it was helpful. Thanks to your feedback, you can also remove items from the initial Search view before you type. We've also made small polish improvements to the look and feel of Windows Search based on what you've shared.

    Screenshot that shows a context menu for a recent item in Windows Search showing Remove from list and thumbs up or thumbs down buttons for sharing feedback.
    A context menu for a recent item in Windows Search shows "Remove from list" and thumbs up or thumbs down buttons for sharing feedback.
  • As noted in our blog post, the new Windows Search opens at the bottom center of the screen. Work is underway to have it adapt to different taskbar positions and when using search from the Start menu.

[Modernized AutoPlay experience]​

  • We've updated the AutoPlay dialog that helps you choose the preferred experience when devices are connected to your PC, such as a phone, camera, or removable drive. Rebuilt with WinUI, the refreshed experience is more consistent with the rest of Windows, supports dark mode, and continues to provide the familiar AutoPlay actions you use today. The experience is also more responsive to text scaling and display settings. Notifications for this dialog are now docked in the notification center for easy access.


    Screenshot that shows the new AutoPlay experience in dark mode.
    The new AutoPlay experience, shown in dark mode.

[Data Protection API (DPAPI)]​

  • This update adds a warning before prompt-based protect and unprotect operations. The warning explains that this prompt-based experience will be retired in April 2027. If you or an app use these prompts, stop creating new prompt-protected data, use a supported non-interactive protection flow, and decrypt or migrate existing prompt-protected data before retirement. DPAPI operations that do not use the prompt-based flow aren't affected. For more details, see CRYPTPROTECT_PROMPTSTRUCT structure (dpapi.h).

[Security]​

  • We've updated the security key PIN entry experience, removing the "other user" icon for a clearer sign-in experience.

    Screenshot of a UI showing the updated security key sign-in experience with a streamlined PIN entry screen.
    UI showing the updated security key sign-in experience with a streamlined PIN entry screen.

[Gaming]​

  • We're introducing a refreshed Gaming Task View experience in XBOX mode, featuring a new navigation bar that provides quick access to Exit to Desktop and Power Options. This update makes key system actions easier to access while gaming.


    Screenshot that shows Gaming Task View showing the new navigation bar with Exit to Desktop and Power options.
    Gaming Task View showing the new navigation bar with Exit to Desktop and Power options.

[File Explorer]​

  • Launching File Explorer Home is now faster and more responsive.
  • The Recommended section on Home now supports touch scrolling, making it easier to browse files in the carousel.
  • File sizes in the Details view now display appropriate units (KB, MB, GB) instead of KB-only, making them easier to understand at a glance.
  • Middle-click to open a folder in a new tab is now supported in the Address Bar and the Home page for a more consistent and efficient tabbed navigation experience across File Explorer.
  • 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.
  • This update addresses an issue that caused the Address Bar contents to be cleared when entering edit mode by clicking near the right end of the bar.

[Windows design]​

  • We are temporarily rolling back the solid (donut) spinners across some of the key Windows scenarios including Boot, Logon, Restart, Shutdown, and Update as we work on a bug. We expect to resume rolling it out soon.

Reminder for Windows Insiders in the Experimental (26H1) channel​

  • These builds can be unstable and might be released with limited documentation.
  • Many features in the Experimental (26H1) channel are rolled out using Controlled Feature Rollout technology, starting with a subset of Insiders and ramping up over time as 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.
  • 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.


 Source:



Check Windows Updates


UUP Dump:

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Last edited:
Downloading and installing. Stuck at 99% downloading for a long time.
Same on 2 machines. 😵‍💫🤷‍♂️
1793380294530.webp

Finally moving to installing.

1793381538710.webp


And again, stuck for quite a while.
1793381830310.webp



Done:

Edition Windows 11 Pro Insider Preview
Version 26H1
Installed on ‎7/‎31/‎2026
Evaluation expires on ‎10/‎31/‎2027 4:43 PM
OS build 28120.3393
Experience Windows Feature Experience Pack 1000.26100.488.0


Edit:
DISM and SFC scans OK.
 
Last edited:

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At a glance

Windows 11 Pro 25H2Intel I9-9900K64GBNVIDIA RTX 2060
OS
Windows 11 Pro 25H2
Computer type
PC/Desktop
Manufacturer/Model
Dell XPS 8930
CPU
Intel I9-9900K
Memory
64GB
Graphics Card(s)
NVIDIA RTX 2060
Sound Card
NVIDIA High Definition Audio
Monitor(s) Displays
4k Samsung
Screen Resolution
3840 x 2160
Hard Drives
512GB NVMe, ADATA SU 800, 2TB HDD
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