Win Update KB5070312 Windows 11 Cumulative Update Preview build 22631.6276 (23H2) - Nov. 20

UPDATE 12/09:

November 20, 2025 - KB5070312 (OS Build 22631.6276) Preview​

This non-security update for Windows 11, version 23H2 (KB5070312), improves functionality, performance, and reliability. To learn more about differences between security updates, optional non-security preview updates, Out-of-band (OOB) updates, and continuous innovation, see Windows monthly updates explained. For information on Windows update terminology, see the different types of Windows software updates.

To view the latest updates about this release, visit the Windows release health dashboard or the update history page for Windows 11, version 23H2.

Announcements and messages​

This section provides key notifications related to this release, including announcements, change logs, and end-of-support notices.

Windows Secure Boot certificate expiration​

Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot securely if not updated in time. To avoid disruption, we recommend reviewing the guidance and taking action to update certificates in advance. For details and preparation steps, see Windows Secure Boot certificate expiration and CA updates.

End of servicing information​

Starting June 26, 2025, Windows 11 version 22H2 (Enterprise and Education editions) will no longer receive non-security preview updates. However, monthly security updates will continue through October 14, 2025. After that date, this version will reach the end of servicing and will no longer receive security updates. To stay protected and up to date, we recommend you upgrade to the latest version of Windows 11.

Learn more

Highlights​

• This non-security update includes quality improvements.

Improvements​

Normal rollout​

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

This non-security update includes quality improvements. The following summary outlines key issues addressed by the KB after you install it. Also, included are available new features. The bold text within the brackets indicates the item or area of the change.

• [Country and Operator Settings Asset (COSA)] Fixed: This update brings profiles up to date for certain mobile operators.
• [File Explorer] Fixed: This update addresses an issue where File Explorer sometimes didn’t respond to mouse clicks until you closed and reopened it.
• [File Management] Fixed: This update addresses an issue with extracting .tar files when file or folder names contain more than 34 commonly used Chinese characters.
• [Group Policy and Configuration] Fixed: This update addresses an issue where the HideRecommendedSection policy didn’t work in Windows 11 Enterprise multi-session environments, such as Azure Virtual Desktop (AVD). Even when configured using Group Policy or Configuration Service Provider (CSP), recommendations still appeared in AVD sessions.

If you installed earlier updates, your device downloads and installs only the new updates contained in this package.

Windows 11 servicing stack update (KB5071963) - 22621.6265​

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. To learn more about SSUs, see Simplifying on-premises deployment of servicing stack updates.

Known issues in this update​

Microsoft is not currently aware of any issues with this udpate.

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.


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 provided in this update, download the file information for cumulative update 5070312.

For a list of the files provided in the servicing stack update, download the file information for the SSU (KB5071963) - versions 22621.6265.





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