Microsoft Releases Windows 11 Preview Build 22499.1010 (KB5008400) to Dev Channel Insiders

Microsoft Windows 11 builds

Earlier this week, Microsoft exit Windows 11 Preview Build 22499 for Dev Channel Insiders. This build comes with the ability to quickly share content from open application windows directly from the taskbar to your Teams meeting calls. Additionally, the Watch app supports signing in with Microsoft work and school accounts.

Today, Microsoft announced the release of Windows 11 Cumulative Update Build 22499.1010 (KB5008400). This update does not include any new features and is designed to test Microsoft’s service delivery system for builds in the Dev Channel.

What’s New in Build 22499

Quickly share open application windows directly from your taskbar with a Microsoft Teams call

During last week’s flight, we introduced the ability to quickly mute and unmute your active meetings right from your taskbar. Today, we’re announcing an extension of that experience with the ability to quickly share content from open application windows directly from your taskbar to your meeting calls. This experience, which also starts with Microsoft Teams, eliminates the need to flip back and forth between apps just to share or reshare a window. Your meeting attendees or what they see on screen are not interrupted – share any open windows during your call.

By hovering over open windows on the taskbar, you can quickly share them with a Microsoft Teams call.
By hovering over open windows on the taskbar, you can quickly share them with a Microsoft Teams call.

When you’re on a meeting call via Microsoft Teams, just hover over the running apps on the taskbar and you’ll see a new button that lets you share your window with meeting attendees. When you’re done sharing your content, hover over the window again and click Stop sharing or select another window and click Share this window. If you’re giving a full-screen presentation in PowerPoint, just move your mouse to the bottom and your taskbar will pop up for you to share or stop sharing the presentation without interruption with others. your attendance.

We’re starting to roll out this experience to a subset of Windows Insiders who have Microsoft Teams for work or school installed, and enhancing this experience over time. This means that not everyone will see this immediately with their Team calls. We plan to bring this feature to Chat from Microsoft Teams (Microsoft Teams for home) later.

Other media applications can also add this capability to their applications. The ability to share your meeting call only applies to your current meeting call.

* App features and availability may vary by region.

Changes and improvements

  • Based on feedback, we’re making the keyboard focus images in Task View and Alt + Tab stand out a bit more to make them easier to see.



  • The clipboard history should be back up and running properly while you are on this build.
  • Clicking on gifs in the emoji panel will now actually insert them into supporting apps, unlike in the previous build.
  • Updated backend dictionaries for some languages ​​- touch keyboard text suggestions and autocorrect are now more accurate.
  • If you change your accent color, the accents in the emoji panel will match now, instead of being stuck with the old color.
  • Fixed an IME crash that sometimes occurred for people who chose to use an earlier version of the pinyin IME.
  • Mitigated the occasional explorer.exe crash that occurred recently related to the use of the touch keyboard.


  • Made another fix to address an issue where explorer.exe would crash if you pressed ALT + F4 while ALT + Tab was open.


  • Fixed a Settings issue that could occur when trying to check remote audio properties while accessing PC via Remote Desktop..


  • Fixed an issue that caused some unwanted clipping/zooming when going through OOBE on some ultra-wide monitors.
  • The apostrophe in the error message when your fingerprint was not recognized on the login screen should display correctly now.
  • When taking a screenshot of a UWP application by pressing the New button in the Snipping Tool, the Snipping Tool will appear in the foreground once the crop is complete.
  • Fixed an issue that caused some internal PCs to check for errors recently when coming out of sleep, with an error message saying “SYSTEM_THREAD_EXCEPTION_NOT_HANDLED”.
  • Fixed possible deadlock related to MediaPlaybackCommandManager, resulting in some apps sometimes not being able to play media.
  • Addresses an issue that causes reports in the Reliability Monitor to go blank unexpectedly with just a blank rectangle when viewing more information.
  • Some have worked to help resolve an issue resulting in some games with noticeable lag only when the window is in focus. Please repeat if necessary, please refer to the following document to submit actionable game completion feedback.

NOTE: Some of the fixes noted here in Insider Preview builds from the active development branch may include them in service updates for the released version of Windows 11, usually on October 5NS.

Known Issues


  • Users updating from Build or earlier, to newer Developer Channel builds using the latest Developer Channel ISO, you may receive the following warning message: The version you are trying to install is Signed Airplane. To continue with the installation, enable flight signing. If you get this message, press the On button, restart your PC and try the update again.
  • We’re investigating an issue where some PCs were unable to install new builds or other updates. The PC may report error code 0x80070002. If you are having this problem, please restart your PC and try again.
  • Some devices may test with error code 0xc1900101-0x4001c when installing this build. If you’re experiencing this, after your device has reverted to a previous build, you may want to pause the update until we release a fix.


  • In some cases, you may not be able to enter text when using Search from Start or the Taskbar. If you have problems, press WIN + R on your keyboard to launch the Run dialog, then close it.


  • The Taskbar will sometimes flash when switching input methods.
  • We are investigating an issue in this build where the Taskbar clock could get stuck and not be updated, especially when accessing the PC via Remote Desktop.


  • Hovering back and forth between different screens in Action View results in thumbnails being displayed and the content area shrinking unexpectedly.


  • We’re working on a fix to address reports from some Insiders that the lights on their keyboards, such as the lid lock, aren’t working properly after upgrading to a previous build .


  • After clicking the Search icon on the Taskbar, the Search panel may not open. If this happens, restart the “Windows Explorer” process and open the search panel again.

[Quick Settings]

  • We are investigating reports from Insiders that the volume and brightness sliders are not displaying correctly in Quick Settings.

The source: Microsoft | Microsoft Releases Windows 11 Preview Build 22499.1010 (KB5008400) to Dev Channel Insiders


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