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Windows 11 Windows 11 Insider 24H2 Insider Preview, Dev Channel
Windows Insider

Build 26120.1843

Build 26120.1843: Windows Insider Dev Channel, September 2024. Shared files in File Explorer and Windows Sandbox controls

In short

Adds shared files in File Explorer and runtime controls in Windows Sandbox, with more interface changes and fixes. Many changes roll out gradually to Insiders who turn on the latest-updates toggle.

Does it affect you? Applies to: Devices enrolled in the Dev Channel. The Snipping Tool update is rolling out to Insiders in the Canary and Dev Channels.

Build
26120.1843
Review notes Additional details from the official release notes (1) Read note
  • What changes Microsoft fixed an underlying issue believed to cause tiworker.exe to use 100% of the CPU; the notes do not guarantee that it can never use 100%.

The official sources are linked at the end of the page.

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

Fixes 17 changes

File Explorer

Gradual rollout 4 items

For: Insiders in the Dev Channel with the latest-updates toggle on

  • Screen readers no longer unexpectedly report that a pane has focus when you open File Explorer with Win + E, and keyboard focus is more reliable.1
    Addresses focus issues with WIN + E and Shift + Tab.
  • Ctrl + F starts a search in File Explorer more reliably.2
  • Screen readers announce when you open or navigate items in the breadcrumb flyouts of open and save dialogs.3
  • Screen readers announce when you open or navigate items in the column header flyout.4

Touchpad

Gradual rollout

For: Insiders in the Dev Channel with the latest-updates toggle on

  • The setting for right-clicking by pressing the lower-right corner of the touchpad no longer appears when the touchpad does not support that feature.5
    Settings > Bluetooth & Devices > Touchpad

Task Manager

Gradual rollout 2 items
  • The background in Task Manager settings displays correctly.6
  • Performance-page graphs show the correct colors in dark mode.16

Windows Modules Installer

For: Everyone in the Dev Channel

  • The Windows Modules Installer no longer unexpectedly uses 100% of the CPU, which could cause freezes and other issues.7
    The issue affected some Insiders on the previous flight and involved tiworker.exe.

Windows Update

For: Everyone in the Dev Channel

  • Some Insiders can install the latest updates without error 0x800f0993.8

Hardware keyboard

For: Everyone in the Dev Channel

  • Text suggestions work properly when selected instead of unexpectedly joining text together.9

Widgets

For: Everyone in the Dev Channel

  • The Widgets icon no longer unexpectedly appears twice in the taskbar.10

FrameShutdownDelay

For: Everyone in the Dev Channel

  • The browser now honors the FrameShutdownDelay value.11
    The value is in HKLM\SOFTWARE\Microsoft\Internet Explorer\Main.

Unified Write Filter and SCCM

For: Devices using Unified Write Filter and Microsoft System Center Configuration Manager

  • An SCCM task to re-enable Unified Write Filter no longer fails in a way that stops the device from restarting as expected.12
    The failure was caused by a deadlock in UWF.

vmswitches

For: Everyone in the Dev Channel

  • Virtual switches can be enumerated with the Get-VMSwitch command.13
    Get-VMSwitch previously failed to enumerate them.

Windows Installer

For: Application owners and administrators

  • When Windows Installer repairs an application, User Account Control now prompts for credentials. Automation scripts might need updating.14
    Application owners must add the Shield icon to indicate that full administrator access is required. The prompt can be disabled by setting HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\Installer\DisableLUAInRepair to 1.

Group Policy Preferences Item Level Targeting and Local Users and Groups

  • In certain multi-forest deployments, target-domain groups and Local Users and Groups accounts are available for selection again.15
    The issue affects deployments where the target domain has a one-way trust with the administrator’s domain, including ESAE, Hardened Forests, or PAM deployments.

Remote Desktop Services

For: Everyone in the Dev Channel

  • Remote Desktop Services no longer stops responding.17

Improvements 13 changes

Microsoft 365 app

Gradual rollout

For: New PCs and new user accounts on managed commercial devices

  • On new PCs or for new user accounts on managed commercial devices, the Microsoft 365 app is pinned to the taskbar. Existing commercial PCs with the previous Copilot in Windows experience get the Copilot app pinned instead.18
    Applies to Windows 11 Enterprise, Education, or Pro devices signed in with an Entra ID or domain account.

Lock screen

Gradual rollout

For: Insiders in the Dev Channel with the latest-updates toggle on

  • Media controls appear at the lower center of the Lock screen while media is playing.19

Start menu

Gradual rollout 2 items

For: Insiders in the Dev Channel with the latest-updates toggle on

  • Right-clicking a pinned app shows its jump list when the app has one.20
  • The account manager shows the sign-out option directly and lists signed-in users under “…” for quicker account switching.21

Taskbar & System Tray

Gradual rollout

For: Insiders in the Dev Channel with the latest-updates toggle on

  • The system tray can show a shorter date and time and display the notification bell based on Do Not Disturb status. You can still reach notifications by selecting the date and time.22
    Settings under Date and Time and System > Notifications control the display; the system tray clock/bell context menu also provides access.

Touch screen

Gradual rollout

For: Insiders in the Dev Channel with the latest-updates toggle on

  • A new Touch settings section lets you disable left- or right-edge touch gestures.23
    Settings > Bluetooth & Devices > Touch

Notifications

Gradual rollout

For: Insiders in the Dev Channel with the latest-updates toggle on

  • You can turn off suggestions to disable notifications from certain apps, either from a suggestion notification or in notification settings.24
    The “Notification Suggestions” sender appears in Settings > System > Notifications after you receive one.

Settings

Gradual rollout

For: Insiders in the Dev Channel with the latest-updates toggle on

  • You can detach a virtual hard disk from its properties in Settings.25
    The detach VHD/VHDx button is under System > Storage > Disks & Volumes.

Delivery Optimization

Gradual rollout

For: Insiders in the Dev Channel with the latest-updates toggle on

  • The Delivery Optimization settings page has a design updated to match Windows 11.26
    Settings > Windows Update > Advanced options > Delivery Optimization

Wi-Fi settings

Gradual rollout

For: Insiders in the Dev Channel with the latest-updates toggle on

  • The dialog for viewing your Wi-Fi password now matches the Windows 11 visuals.27
    Settings > Network & internet

Fonts

Gradual rollout

For: Insiders in the Dev Channel with the latest-updates toggle on

  • Links to the Fonts Control Panel page open Fonts settings instead. You can still open the Control Panel page through the system fonts folder in File Explorer.28
    The system fonts folder is also linked from Settings > Personalization > Fonts.

OpenSSH

For: Everyone in the Dev Channel

  • Turning on OpenSSH through Server Manager now prompts you to confirm.29

DNS

For: Devices using DNS servers

  • DNS server security is hardened. Out-of-date domain configurations might result in a SERVFAIL error or a timeout.30
    The change hardens DNS server security; the notes caution about domains whose configurations are not up to date.

New features 4 changes

File Explorer Home

Gradual rollout

For: Insiders in the Dev Channel with the latest-updates toggle on

  • A Shared tab gives you quick access to files shared with your account. Recent, Favorites, and Shared also support more file types.31
    Microsoft account users can see files shared with their account. Commercial users signed in with a Microsoft Entra ID account can also see files they have shared with others.

Windows Sandbox Client Preview

Gradual rollout

For: Insiders in the Dev Channel with the latest-updates toggle on

  • The preview adds controls for clipboard sharing, audio and video input, and sharing folders with the host while Sandbox is running. It also includes an early version of command-line support.32
    The controls are available from the app’s “…” menu. Use wsb.exe –help for command-line information; commands may change.

Search on the Taskbar

Gradual rollout

For: Insiders in the Dev Channel with the latest-updates toggle on

  • You can share local files directly from search results in the taskbar search box.33

Snipping Tool

Gradual rollout

For: Insiders in the Canary and Dev Channels

  • You can choose the folder where original screenshots and screen recordings are saved.34
    Available in Snipping Tool version 11.2408.13.0 and newer; choose a new default folder in the app settings.

Removals 2 changes

Recall

For: Everyone in the Dev Channel

  • Recall no longer appears as an option in the Control Panel dialog for turning Windows features on or off.35

NetJoinLegacyAccountReuse

For: Everyone in the Dev Channel

  • The NetJoinLegacyAccountReuse registry key is removed.36
    See KB5020276 for details on domain join hardening changes.

Technical details

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

Data sheet

Released
2024-09-20
Type
Windows Insider build
VersionBuildChannel
— 26120.1843 Dev Channel

Security

No vulnerabilities are listed for this update.

Sources

Updated
Cited passages from Microsoft's official notes (36)
  1. 1. Fixed an issue where when pressing WIN + E, a screen reader might unexpectedly say a pane had focus, or focus may not be set within File Explorer at all. blogs.windows.com
  2. 2. Fixed an issue which was causing CTRL + F to sometimes not start a search in File Explorer. blogs.windows.com
  3. 3. Fixed an issue causing screen readers to not announce when you were opening or navigating items in the breadcrumb flyouts of the open or save dialog. blogs.windows.com
  4. 4. Fixed an issue causing screen readers to not announce anything when opening or navigating items in the column header flyout in File Explorer. blogs.windows.com
  5. 5. Updated the logic for the setting “Press the lower right corner of the touchpad to right-click” Settings > Bluetooth & Devices > Touchpad so it shouldn’t show in cases where the touchpad doesn’t support the functionality. blogs.windows.com
  6. 6. Fixed an issue where the background wasn’t displayed correctly in Task Manager settings. blogs.windows.com
  7. 7. Fixed an underlying issue believed to be the cause of Insiders on the previous flight finding the Windows Modules Installer (tiworker.exe) unexpectedly using 100% of the CPU, causing freezes and other issues on PCs. blogs.windows.com
  8. 8. Fixed an issue causing some Insiders to fail to install the latest updates, seeing error 0x800f0993. blogs.windows.com
  9. 9. Fixed an issue causing text suggestions for the hardware keyboard to not work properly (selecting one unexpectedly concatenates). blogs.windows.com
  10. 10. Fixed an issue which could result in the Widgets icon unexpectedly displaying in the taskbar twice sometimes. blogs.windows.com
  11. 11. The browser ignores its value in the “HKLM\SOFTWARE\Microsoft\Internet Explorer\Main” registry key. blogs.windows.com
  12. 12. An SCCM task to re-enable UWF fails because of a deadlock in UWF. This stops the device from restarting when you expect it. blogs.windows.com
  13. 13. They fail to enumerate using Get-VMSwitch command. blogs.windows.com
  14. 14. When it repairs an application, the User Account Control (UAC) does not prompt for your credentials. After you install this update, the UAC will prompt for them. blogs.windows.com
  15. 15. You cannot choose a group from the target domain for ILT. Also, you cannot choose an account from Local Users and Groups. blogs.windows.com
  16. 16. Graphs on the Performance page in Task Manager do not show the correct colors when you use dark mode. blogs.windows.com
  17. 17. It stops responding. blogs.windows.com
  18. 18. For new PCs or new user accounts on managed commercial devices (PCs running Windows 11 Enterprise, Education, or Pro logged in with an Entra ID (or domain), the Microsoft 365 app will be pinned to the taskbar for quick access to Copilot for Microsoft 365. blogs.windows.com
  19. 19. We have updated the Lock screen so that the media controls will now show at the lower bottom center of the Lock screen now when media is being played. blogs.windows.com
  20. 20. When right-clicking on apps pinned to the Start menu, jump lists will be shown for apps that have them such as PowerPoint. blogs.windows.com
  21. 21. we’ve made some updates to the new account manager on the Start menu making the sign out option directly visible, and adding a list of signed in users under “…” so it’s faster to switch accounts. blogs.windows.com
  22. 22. We are trying out a more simplified system tray to highlight the date/time in a shortened form and to show the notifications bell icon based on DND status. blogs.windows.com
  23. 23. We have updated Settings > Bluetooth & Devices > Touch to have a new section for touch screen edge gestures, where you can choose if you would like to disable the left or right screen edge touch gesture. blogs.windows.com
  24. 24. If desired, there’s now an option to turn off the suggestions to disable notifications from certain apps. blogs.windows.com
  25. 25. In response to feedback, we have added a detach virtual hard disk (VHD/VHDx) button to Settings making it much simpler to detach your VHD/VHDx as needed. blogs.windows.com
  26. 26. We’ve designed the settings page for Delivery Optimization under Settings > Windows Update > Advanced options > Delivery Optimization to match the Windows 11 design principles. blogs.windows.com
  27. 27. We’ve updated the dialog when viewing your Wi-Fi password under Settings > Network & internet to match the Windows 11 visuals. blogs.windows.com
  28. 28. We’re beginning to roll out a change that redirects links for the Fonts Control Panel page to the Fonts settings page at Settings > Personalization > Fonts. blogs.windows.com
  29. 29. This update adds a prompt that asks you to confirm when you turn on OpenSSH using the Server Manager UI. blogs.windows.com
  30. 30. This update hardens DNS server security to address CVE-2024-37968. If the configurations of your domains are not up to date, you might get the SERVFAIL error or time out. blogs.windows.com
  31. 31. File Explorer will now provide you with quick access to files that have been shared with you. blogs.windows.com
  32. 32. we’re introducing runtime clipboard redirection, audio/video input control, and the ability to share folders with the host at runtime. blogs.windows.com
  33. 33. We are beginning to roll out the ability to share local files directly from within the search results shown in the search box on the taskbar. blogs.windows.com
  34. 34. introduces the ability to change the folder that original screenshots and screen recordings are automatically saved to. blogs.windows.com
  35. 35. We can confirm that the Recall feature is no longer showing as an option under the ‘Turn Windows features on or off’ dialog in the Control Panel in Windows. blogs.windows.com
  36. 36. This update removes this registry key. blogs.windows.com
Checked automatically: 8 of 8 checks passed, 36 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 4/5, 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