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Release Date:

14/12/2021

Version:

OS Build 20348.405

11/9/2021
IMPORTANT Because of minimal operations during the holidays and the upcoming Western new year, there won’t be a preview release (known as a “C” release) for the month of December 2021. There will be a monthly security release (known as a “B” release) for December 2021. Normal monthly servicing for both B and C releases will resume in January 2022. 

Improvements and fixes

This security update includes quality improvements. Key changes include: 

  • Addresses a known issue that might prevent Microsoft Defender for Endpoint from starting or running on devices that have a Windows Server Core installation. 

For more information about the resolved security vulnerabilities, please refer to the Security Update Guide and the December 2021 Security Updates

To return to the Azure Stack HCI documentation site

Windows 10 servicing stack update - 20348.403

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

Symptom

Workaround

After you install this update on a server that is running Windows Server 2022, you might not be able to use Remote Desktop to reach the server. Eventually, the server might stop responding. Additionally, a black screen might appear, and signing in and general performance might slow.

This issue is resolved in KB5010197.

After installing this update, text input using a Japanese IME might be entered out of order or the text cursor might move unexpectedly in apps that use the multibyte character set (MBCS). This issue affects both the Microsoft Japanese IME and third-party Japanese IMEs.

This issue is resolved in KB5009555.

How to get this update

Before installing this update

Microsoft now 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.

To install the LCU on your Azure Stack HCI cluster, see Update Azure Stack HCI clusters.

Prerequisite:

You must install KB5005039, dated August 10, 2021, before installing the LCU.

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: Azure Stack HCI

Classification: Security Updates

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 5008223.

For a list of the files that are provided in the servicing stack update, download the file information for the SSU - version 20348.403

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