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Windows 11 Windows 11 Insider 26H2 Insider Preview, Experimental Channel
Windows Insider

Build 26340.9233

Build 26340.9233: Windows Insider Experimental Channel, August 2026. Per-app privacy controls and a simpler AutoPlay dialog

In short

Adds per-app desktop permissions, updates AutoPlay, and includes accessibility and file preview changes, plus fixes.

Does it affect you? Applies to: Devices enrolled in the Windows Insider Program in the Experimental Channel.

Build
26340.9233

This is a test build for people in the Windows Insider Program. Features in it can change, be removed, or never reach regular Windows releases.

What changes

Improvements 4 changes

Widgets

Gradual rollout

For: Insiders on newer builds

  • Weather becomes the primary lock screen widget, with less recommended content and more control over which widgets appear.1
    Personalize widgets at Settings > Personalization > Lock screen. A restart might be needed if the device is already on build 26340.9233.

Modernized AutoPlay experience

Gradual rollout

For: Insiders in the Experimental Channel

  • The AutoPlay dialog has a refreshed look, supports dark mode and text scaling, and keeps its notifications in the notification center.2
    The dialog is rebuilt with WinUI and responds to display settings.

File Explorer

Gradual rollout

For: Insiders in the Experimental Channel

  • PDF and non-HTML files downloaded from the web can now appear automatically in the preview pane.3

Installed apps

Gradual rollout

For: Insiders in the Experimental Channel

  • The Installed apps page now shows packaged apps' version numbers at the top level.4
    Settings > Apps > Installed apps.

Fixes 3 changes

Taskbar

For: Insiders in the Experimental Channel

  • Taskbar animations no longer briefly work and then stop working.5

Input

For: Insiders in the Experimental Channel

  • The mouse cursor is visible again in apps where it could disappear.6

Settings

For: Insiders in the Experimental Channel

  • Available flags no longer appear missing from the Windows Insider Program settings page.7
    The affected path is Settings > Windows Update > Windows Insider Program > Flags.

New features 3 changes

Accessibility

Gradual rollout

For: Insiders in the Experimental Channel

  • A new setting automatically opens app windows maximized, so you do not have to maximize them yourself.8
    Turn on Open apps maximized at Settings > Accessibility > Visual effects.

Manage camera, microphone, and location access for desktop apps

Gradual rollout

For: Insiders in the Experimental Channel

  • You can allow or deny camera, microphone, and location access separately for each desktop app. Apps that have not accessed a resource before prompt you the first time they request it.9
    Manage permissions at Settings > Privacy & security > Camera, Microphone, or Location. Existing permission decisions and enterprise policies remain in place. Some apps might appear under a different name or as Unsigned.

Microsoft Store

Gradual rollout

For: Developers of packaged WinUI 3 apps

  • Packaged WinUI 3 apps that need elevated permissions can support in-app purchases through Microsoft's integrated commerce platform.10

Technical details

Data sheet · Security · Downloads · Components Click to collapse or expand

Data sheet

Released
2026-08-21
Type
Windows Insider build
VersionBuildChannel
— 26340.9233 Experimental Channel

Security

No vulnerabilities are listed for this update.

Sources

Updated
Cited passages from Microsoft's official notes (10)
  1. 1. Weather will be the primary widget shown on the lock screen, reducing recommended widget content and making the experience feel more focused. learn.microsoft.com
  2. 2. 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. learn.microsoft.com
  3. 3. PDF and non-HTML files downloaded from the web can now be previewed automatically in the preview pane. learn.microsoft.com
  4. 4. Updated Settings > Apps > Installed apps to show the version number at the top level for packaged apps, as it already does for other apps. learn.microsoft.com
  5. 5. Fixed an issue in the latest builds causing taskbar animations to briefly work and then stop working. learn.microsoft.com
  6. 6. Fixed an issue in the latest builds causing the mouse cursor not to be visible in certain apps. learn.microsoft.com
  7. 7. Fixed an issue from the last flight causing Settings > Windows Update > Windows Insider Program > Flags to appear empty even though flags were available. learn.microsoft.com
  8. 8. We're introducing a new accessibility setting, Open apps maximized, that automatically maximizes app windows when they open, so you no longer have to do it yourself every time. learn.microsoft.com
  9. 9. Windows Insiders can now manage camera, microphone, and location permissions for individual desktop apps. learn.microsoft.com
  10. 10. This update provides support for in-app purchases in packaged WinUI 3 apps that require elevation, helping developers offer purchases through Microsoft's integrated commerce platform. learn.microsoft.com
Checked automatically: 8 of 8 checks passed, 10 quoted passages
  • Quotes found in the official pages: passed
  • Numbers found in the sources: passed
  • Vulnerabilities from the dossier only: passed
  • Links to allowed domains only: passed
  • Every official change covered: passed
  • Readable plain text: passed
  • Changes confirmed by the file list: passed
  • Sources agree: passed

A second AI read the text against the sources: correctness 5/5, clarity 4/5, completeness 4/5. How we work

Published by The Update Bureau. Written with AI from Microsoft's own documents, checked by rules and a second AI. How we work · Report a mistake