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

Build 26120.2200

Build 26120.2200: Windows Insider Dev Channel, October 2024. Studio Effects tray icon and more accurate Disk Cleanup estimates

In short

Adds a Studio Effects camera icon, changes Dynamic Lighting controls, and includes fixes for issues such as inaccurate Disk Cleanup estimates.

Does it affect you? Applies to: Windows Insiders in the Dev Channel, receiving updates based on Windows 11, version 24H2 through an enablement package.

Build
26120.2200

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 10 changes

Start menu

Gradual rollout

For: Insiders with the latest-updates toggle on

  • The All apps list no longer may break when you click or tap a letter.1

Taskbar

Gradual rollout

For: Some Insiders with the latest-updates toggle on

  • Hovering over some open apps in the taskbar no longer causes File Explorer to crash for some Insiders.2
    Fixes an explorer.exe crash when hovering over certain open apps in the taskbar.

Settings

Gradual rollout

For: Insiders with the latest-updates toggle on

  • Clicking a blank entry in Privacy & Security no longer crashes Settings.3

Windows Kernel Vulnerable Driver Blocklist file (DriverSiPolicy.p7b)

For: Everyone in the Dev Channel

  • The vulnerable driver blocklist adds drivers that pose a risk for Bring Your Own Vulnerable Driver attacks.4
    Adds drivers at risk for Bring Your Own Vulnerable Driver (BYOVD) attacks to DriverSiPolicy.p7b.

HTML Applications (HTA)

For: Everyone in the Dev Channel

  • HTA optional components are now included in ARM64 Windows PE.5
    HTA optional components (OC) are now in ARM64 Windows PE.

Live kernel debug files (dumps)

For: Everyone in the Dev Channel

  • Live kernel debug files are no longer created when they should not be.6
    sys creates live kernel debug files when it should not.

User interface (UI)

For: Everyone in the Dev Channel

  • Parts of the interface that were hidden when certain apps ran are now visible.7

Winlogon

For: Everyone in the Dev Channel

  • A stop error during shutdown is fixed.8

sfc /scannow command

For: Everyone in the Dev Channel

  • The command no longer returns errors every time it runs.9

Windows Disk Cleanup app

For: Everyone in the Dev Channel

  • Free-space estimates in Disk Cleanup are more accurate.10
    Addresses some causes of incorrect free-space estimates.

Improvements 3 changes

Dynamic Lighting

Gradual rollout 2 items

For: Insiders with the latest-updates toggle on

  • When no compatible devices are connected, the Dynamic Lighting settings page shows a placeholder and disables the Brightness and Effects controls.11
  • The Wave effect gains Forward, Backward, Outward, and Inward directions. The Gradient effect gains a Forward direction.12

Input

Gradual rollout

For: Insiders with the latest-updates toggle on

  • The pointer-location circles shown when you press Ctrl are now easier to see on high-resolution monitors.13
    The “Show location of pointer when I press the CTRL key” option now displays DPI-aware circles.

New feature 1 change

Windows Studio Effects

Gradual rollout

For: Insiders with the latest-updates toggle on using a Studio Effects-enabled camera

  • A system tray icon appears when an app uses a Studio Effects-enabled camera. Click it to open Studio Effects in Quick Settings, or hover over it to see which app is using the camera.14
    The icon appears in the taskbar system tray and launches the Studio Effects page in Quick Settings.

Technical details

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

Data sheet

Released
2024-10-25
Type
Windows Insider build
VersionBuildChannel
— 26120.2200 Dev Channel

Security

No vulnerabilities are listed for this update.

Sources

Updated
Cited passages from Microsoft's official notes (14)
  1. 1. Fixed an issue where if you clicked or tapped on a letter on Start menu’s All apps list, the All apps list may break. blogs.windows.com
  2. 2. Fixed an issue where explorer.exe was crashing for some Insiders when hovering over certain open apps in the taskbar. blogs.windows.com
  3. 3. Fixed an issue where there was a blank entry in Privacy & Security and clicking it would crash Settings. blogs.windows.com
  4. 4. This update adds to the list of drivers that are at risk for Bring Your Own Vulnerable Driver (BYOVD) attacks. blogs.windows.com
  5. 5. HTA optional components (OC) are now in ARM64 Windows PE. blogs.windows.com
  6. 6. sys creates live kernel debug files when it should not. blogs.windows.com
  7. 7. You cannot view some parts of the UI when you run certain apps. blogs.windows.com
  8. 8. A stop error occurs during shutdown. blogs.windows.com
  9. 9. You get errors every time you run the command. blogs.windows.com
  10. 10. This update addresses some of the causes for the wrong free space estimates and improves its accuracy. blogs.windows.com
  11. 11. When no compatible devices are attached, the Dynamic Lighting settings page will now show a placeholder message and Brightness and Effects controls are disabled. blogs.windows.com
  12. 12. we have added Forward, Backward, Outward and Inward direction options to the Wave effect, and added the Forward direction option to the Gradient effect. blogs.windows.com
  13. 13. Updated the mouse option “Show location of pointer when I press the CTRL key”, so that the circles displayed are now DPI-aware, and aren’t really small on high DPI monitors. blogs.windows.com
  14. 14. an icon will now appear in the system tray when using any application with a Studio Effects-enabled camera. Simply click on this icon to launch the Studio Effects page in Quick Settings. blogs.windows.com
Checked automatically: 8 of 8 checks passed, 14 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