Note
9/26/23
IMPORTANT As of September 26, 2023, there are no more optional, non-security preview releases for Windows 11, version 21H2. Only cumulative monthly security updates will continue for the supported versions of Windows 11, version 21H2.
Note
- 10/10/2023
REMINDER Some editions of Windows 11, version 21H2 reached end of service on October 10, 2023. These are Home, Pro, Pro Education, and Pro for Workstation. After that date, devices that run these editions will not receive monthly security and quality updates. These updates contain protections from the latest security threats. - We will continue to support the remaining editions of Windows 11, version 21H2.
Note
- 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 21H2, see its update history page.
- Note Follow @WindowsUpdate to find out when new content is published to the Windows release health dashboard.
Tip
Looking for this month's video? It's now in the article for Windows 11, versions 22H2 and 23H2.
Highlights
- This update addresses security issues for your Windows operating system.
Improvements
This security update includes improvements. When you install this KB:
- This update affects the Netherlands time zone. It adds the recent man-made landmass outside of Rotterdam to the shape files.
- This update affects Microsoft Defender for Endpoint (MDE). It enables Conditional Access (CA) scenarios.
If you installed earlier updates, only the new updates contained in this package will be downloaded and installed on your device.
For more information about security vulnerabilities, please refer to the Security Update Guide website and the December 2023 Security Updates.
Windows 11 servicing stack update - 22000.2592
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 |
|---|---|---|
| IT admins | Using the FixedDrivesEncryptionType or SystemDrivesEncryptionType policy settings in the BitLocker configuration service provider (CSP) node in mobile device management (MDM) apps might incorrectly show a 65000 error in the "Require Device Encryption" setting for some devices in your environment. Affected environments are those with the “Enforce drive encryption type on operating system drives” or "Enforce drive encryption on fixed drives" policies set to enabled and selecting either "full encryption" or "used space only". Microsoft Intune is affected by this issue but third-party MDMs might also pe affected.Important This issue is a reporting issue only and does not affect drive encryption or the reporting of other issues on the device, including other BitLocker issues. | This issue is addressed in KB5034121. |
How to get this update
Before installing 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
| Release Channel | Available | Next Step |
|---|---|---|
| Windows Update and Microsoft Update | Yes | None. This update will be downloaded and installed automatically from Windows Update. |
| Windows Update for Business | Yes | None. This update will be downloaded and installed automatically from Windows Update in accordance with configured policies. |
| Microsoft Update Catalog | Yes | To get the standalone package for this update, go to the Microsoft Update Catalog website. |
| Windows Server Update Services (WSUS) | Yes | This update will automatically sync with WSUS if you configure Products and Classifications as follows: Product: Windows 11 Classification: Security Updates |
Note
- 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 5033369.
For a list of the files that are provided in the servicing stack update, download the file information for the SSU - version 22000.2592.