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

Build 26340.9482

Build 26340.9482: Windows Insider Experimental Channel, September 2026. Faster File Explorer search and a red screen-capture border

In short

The Experimental Channel build tests faster File Explorer search, a red screen-capture border, and other interface changes, plus fixes for context menu, Settings, and brightness issues.

Does it affect you? Applies to: Devices enrolled in the Windows Insider Program in the Experimental Channel. Memory Integrity changes apply to eligible supported PCs.

Build
26340.9482

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 6 changes

Security

Gradual rollout

For: Insiders on eligible supported PCs

  • Memory Integrity might turn on during updates on more eligible supported PCs. It helps improve security and prepare devices for advanced Windows security features, while respecting existing user and IT administrator choices.1
    Memory Integrity (HVCI) might be enabled during updates.

Context menu

Gradual rollout

For: Insiders in the Experimental Channel

  • The new context menu settings let you turn off the customize context menu entry.2

File Explorer search

Gradual rollout

For: Insiders in the Experimental Channel

  • Search from This PC is much faster and consistent with search from File Explorer Home.3
    Search from This PC is indexer-based.

Taskbar

Gradual rollout

For: Insiders using small taskbar icons

  • The IME icon scales better when you use small taskbar icons.4

Screen capture

Gradual rollout

For: Insiders in the Experimental Channel

  • The capture border is red instead of yellow, making active screen-capture sessions easier to identify.5

Settings

Gradual rollout

For: Insiders in the Experimental Channel

  • The Temporary files page has small visual adjustments.6
    The page is under Settings > System > Storage.

Fixes 4 changes

Context menu

Gradual rollout

For: Insiders in the Experimental Channel

  • The Send To option in the context menu works as expected.7

Settings

Gradual rollout 2 items

For: Insiders in the Experimental Channel

  • Mouse cursor customization works correctly again after recent builds.8
  • Desktop background customization persists after a reboot again.9

Brightness

Gradual rollout

For: Insiders experiencing brightness issues

  • An underlying issue that caused some Insiders to have brightness problems, including unexpectedly grayed-out brightness settings, is fixed. Report any continuing issues.10

New feature 1 change

Context menu

Gradual rollout

For: Insiders in the Experimental Channel

  • A first-time teaching tip can help you learn about context menu customization options.11

Technical details

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

Data sheet

Released
2026-09-11
Type
Windows Insider build
VersionBuildChannel
— 26340.9482 Experimental Channel

Security

No vulnerabilities are listed for this update.

Sources

Updated
Cited passages from Microsoft's official notes (11)
  1. 1. Windows might now enable Memory Integrity (HVCI) during updates on supported PCs to help improve security and prepare devices for advanced Windows security features, while respecting existing user or IT administrator choices. learn.microsoft.com
  2. 2. you can also now turn off the customize context menu entry in the new context menu settings. learn.microsoft.com
  3. 3. Search from This PC in File Explorer is now indexer-based, making it much faster and consistent with search from File Explorer Home. learn.microsoft.com
  4. 4. Improved how the IME icon scales in the taskbar when using small taskbar icons. learn.microsoft.com
  5. 5. We updated the visual indicator shown during screen capture, changing the capture border from yellow to red to make active capture sessions easier to identify. learn.microsoft.com
  6. 6. Made some small visual adjustments to improve the design of the Temporary files page under Settings > System > Storage. learn.microsoft.com
  7. 7. We've fixed a few small issues with the Send To option in the context menu not working as expected. learn.microsoft.com
  8. 8. Fixed an issue causing mouse cursor customization to not work correctly after the latest flights. learn.microsoft.com
  9. 9. Fixed an issue causing desktop background customization to not persist after a reboot after the latest flights. learn.microsoft.com
  10. 10. Fixed an underlying issue resulting in some Insiders experiencing issues with brightness after the latest flights, including brightness settings being unexpectedly grayed out. learn.microsoft.com
  11. 11. We've added a new teaching tip you might see as a first-time experience to help you learn about the customization options. learn.microsoft.com
Checked automatically: 8 of 8 checks passed, 11 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 5/5. 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