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Release Date:

12/14/2021

Version:

OS Build 18363.1977

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. 

11/19/20
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 10, version 1909, see its update history page.

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

Highlights

  • Updates security for your Windows operating system. 

Improvements and fixes

This security update includes quality improvements. Key changes include:

  • Adds support for the cancellation of daylight savings time for the Republic of Fiji for 2021.

  • Addresses an issue that incorrectly renders some variable fonts.

  • Addresses an issue that occurs when a dialog opens within Internet Explorer.

  • Addresses a known issue that causes error codes 0x000006e4, 0x0000007c, or 0x00000709 when connecting to a remote printer that is shared on a Windows print server.

  • Addresses a known issue that might prevent apps, such as Kaspersky apps, from opening after you attempt to repair or update the apps using the Microsoft Installer (MSI).

If you installed earlier updates, only the new fixes contained in this package will be downloaded and installed on your device. 

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

Windows 10 servicing stack update - 18363.1912

  • 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

Microsoft is not currently aware of any issues in this update

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). SSUs improve the reliability of the update process to mitigate potential issues while installing the LCU. For general information about SSUs, see Servicing stack updates and Servicing Stack Updates (SSU): Frequently Asked Questions.

Prerequisite:

You must install the July 13, 2021 SSU (KB5004748) 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: Windows 10, version 1903 and later

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 5008206

For a list of the files that are provided in the servicing stack update, download the file information for the SSU - version 18363.1912

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