Applies To
Windows 10 Enterprise and Education, version 21H2 Windows 10 IoT Enterprise, version 21H2 Windows 10 Enterprise Multi-Session, version 21H2 Windows 10, version 22H2, all editions

Release Date:

1/9/2024

Version:

OS Builds 19044.3930 and 19045.3930

EXPIRATION NOTICE

IMPORTANT As of March 31, 2026, this update is no longer available from the Microsoft Update Catalog or other release channels. We recommend that you update your devices to the latest version of Windows.

 

11/17/20

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 22H2, see its update history page. 

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

Highlights

  • This update addresses security issues for your Windows operating system. 

Improvements 

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

Important: Use EKB KB5015684 to update to Windows 10, version 22H2.

This security update includes quality improvements. Key changes include: 

  • This build includes all the improvements from the supported Windows 10, version 21H2 editions.

  • No additional issues are documented for this release. 

Important: Use EKB KB5003791 to update to Windows 10, version 21H2 on supported editions.

This security update includes quality improvements that were a part of update KB5033372 (released December 12, 2023). When you install this KB:

  • This update addresses an issue that affects the ActiveX scroll bar. It does not work in IE mode.

  • This update addresses an issue that causes your device to shut down after 60 seconds. This occurs when you use a smart card to authenticate on a remote system.

  • This update addresses an issue that affects the display of a smart card icon. The icon does not appear when you sign in. This occurs when there are multiple certificates on the smart card.

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 new Security Update Guide website and the January 2024 Security Updates. 

Windows 10 servicing stack update - 19044.3745 and 19045.3745

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.

Symptom

Workaround

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 KB5034203.

Windows devices using more than one (1) monitor might experience issues with desktop icons moving unexpectedly between monitors or other icon alignment issues when attempting to use Copilot in Windows (in preview).

We are gradually rolling out a new Copilot experience for devices with KB5039299or later updates installed. This new experience will address this issue.

KB5039299 was released on June 25, 2024, and you can expect to receive the new Copilot experience sometime from now until the next few months.

Copilot in Windows (in preview) is not currently supported when your taskbar is located vertically on the right or left of your screen.

We are gradually rolling out a new Copilot experience for devices with KB5039299 or later updates installed. This new experience will address this issue.

KB5039299 was released on June 25, 2024, and you can expect to receive the new Copilot experience sometime from now until the next few months.

How to get this update

EXPIRATION NOTICE

IMPORTANT As of March 31, 2026, this update is no longer available from the Microsoft Update Catalog or other release channels. We recommend that you update your devices to the latest version of Windows.

Facebook LinkedIn Email
SUBSCRIBE RSS FEEDS

Need more help?

Want more options?

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