Applies ToWindows 11 Enterprise and Education, version 22H2 Windows 11 version 23H2, all editions

Release Date:

26/09/2024

Version:

OS Builds 22621.4249 and 22631.4249

07/09/24---END OF SERVICE NOTICE---

IMPORTANT Home and Pro editions of Windows 11, version 22H2 will reach end of service on October 8, 2024. Until then, these editions will only receive security updates. They will not receive non-security, preview updates. To continue receiving security and non-security updates after October 8, 2024, we recommend that you update to the latest version of Windows.

Note We will continue to support Enterprise and Education editions after October 8, 2024.

For information about Windows update terminology, see the article about the types of Windows updates and the monthly quality update types. For an overview of Windows 11, version 23H2, see its update history page.  

Note Follow @WindowsUpdate to find out when new content is published to the Windows release health dashboard.      

Highlights 

Note: Below is a summary of the key issues that this update addresses when you install this KB. If there are new features, it lists them as well. The bold text within the brackets indicates the item or area of the change we are documenting.

Gradual rollout

These might not be available to all users because they will roll out gradually.​​​

  • [Taskbar]​​​​​​​ New! You can now share local files directly from the search results that appear in the Search box on the taskbar.

  • [Settings] New! The Delivery Optimization Settings page now matches the Windows 11 design. See Settings > Windows Update > Advanced options > Delivery Optimization.

  • [Windows Share] New! This update removes the search box from the Windows Share window.

  • [Lock screen] New! Media controls now show in the lower part of the lock screen at its center when media is playing.

  • [Start menu] New! ​​​​​​​The Sign out command is now on the account manager when you open the Start menu. To change to a different user, select the ellipses (...). A list of other users appears to make it easier to switch.

Normal rollout

  • [Microsoft Edge] It sometimes stops responding when you use IE mode.

  • [Windows identity protection] Users no longer need to enter their credentials more than once for Outlook or another encrypted email app. A user will be prompted for their PIN one time only.

  • [Copilot Pro subscription] New! You can now manage your Copilot Pro subscription in Settings. Sign in to your Microsoft account and go to Settings>Accounts.

  • [Task Manager] It stops responding when you switch from a high contrast theme to a normal theme.

Improvements

Note: To view the list of addressed issues, click or tap the OS name to expand the collapsible section.

Important: Use EKB KB5027397 to update to Windows 11, version 23H2.

This non-security update includes quality improvements. Key changes include:

  • This build includes all the improvements in Windows 11, version 22H2.

  • No additional issues are documented for this release.

This non-security update includes quality improvements. Below is a summary of the key issues that this update addresses when you install this KB. If there are new features, it lists them as well. The bold text within the brackets indicates the item or area of the change we are documenting.

  • [IE mode] Microsoft Edge sometimes stops responding when you use IE mode.

  • [Transmission Control Protocol (TCP)] There is inconsistent data between TCP_INFO_v1 and GetPerTcpConnectionEstats. File synchronization services use TCP connection performance analysis tools. This issue affects how accurate those tools are.

  • [Country and Operator Settings Asset] This update brings COSA profiles up to date for certain mobile operators.

  • [Outlook and other encrypted email apps] This issue prompts for your PIN each time you open an encrypted email.

  • [Microsoft Defender for Endpoint] Work Folders files fail to sync when Defender for Endpoint is on. ​​​​​​​

Windows 11 servicing stack update (KB5043143) - 22621.4245 and 22631.4245

This update makes quality improvements to the servicing stack, which is the component that installs Windows updates. Servicing stack updates (SSU) ensure that you have a robust and reliable servicing stack so that your devices can receive and install Microsoft updates. 

Known issues in this update

Applies to

Symptom

Workaround

All users

After installing this update, some customers have reported that their device restarts multiple times or becomes unresponsive with blue or green screens. According to the reports, some devices automatically open the Automatic Repair tool after repeated restart attempts. In some cases, BitLocker recovery can also be triggered.

This issue is addressed in KB5044285.

How to get this update

Before you install this update

Microsoft combines the latest servicing stack update (SSU) for your operating system with the latest cumulative update (LCU). For general information about SSUs, see Servicing stack updates and Servicing Stack Updates (SSU): Frequently Asked Questions.

Install this update

To install this update, use one of the following Windows and Microsoft release channels.

Windows UpdateBusinessCatalogServer Update Services

Available

Next Step

Yes

Go to Settings > Update & Security > Windows Update. In the Optional updates available area, you will find the link to download and install the update.

Available

Next Step

No

None. These changes will be included in the next security update to Windows Update for Business.

Available

Next Step

Yes

To get the standalone package for this update, go to the Microsoft Update Catalog website.

Available

Next Step

No

You can import this update into Windows Server Update Services (WSUS) manually. See the Microsoft Update Catalog for instructions.

If you want to remove the LCU

To remove the LCU after installing the combined SSU and LCU package, use the DISM/Remove-Package command line option with the LCU package name as the argument. You can find the package name by using this command: DISM /online /get-packages.

Running Windows Update Standalone Installer (wusa.exe) with the /uninstall switch on the combined package will not work because the combined package contains the SSU. You cannot remove the SSU from the system after installation.

File information

For a list of the files that are provided in this update, download the file information for cumulative update 5043145.   

For a list of the files that are provided in the servicing stack update, download the file information for the SSU (KB5043143) - versions 22621.4245 and 22631.4245. 

Facebook LinkedIn Email
SUBSCRIBE RSS FEEDS

Need more help?

Want more options?

Discover Community

Explore subscription benefits, browse training courses, learn how to secure your device, and more.

Microsoft 365 subscription benefits

Microsoft 365 training

Microsoft security

Accessibility center

Communities help you ask and answer questions, give feedback, and hear from experts with rich knowledge.

Ask the Microsoft Community

Microsoft Tech Community

Windows Insiders

Microsoft 365 Insiders