July 8, 2025—KB5062554 (OS Builds 19044.6093 and 19045.6093)

Windows Secure Boot certificate expiration

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Change date	Change description
July14, 2025	Added 2 known issues. "Microsoft Changjie Input Method Editor" and "Windows Emoji Panel".

Summary

This article lists the security issues and quality improvements included in this security update.

Applies to: Windows 10 Enterprise LTSC 2021 and Windows 10 IoT Enterprise LTSC 2021

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

This security update includes fixes and quality improvements that were a part of the following updates:

The following is a summary of the issues that this update addresses when you install this update. If there are new features, it lists them as well. The bold text within the brackets indicates the item or area of the change we are documenting.

[Internal Windows OS] This update contains miscellaneous security improvements to internal Windows OS functionality. No specific issues are documented for this release.

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 July 2025 Security Updates.

For more information about Windows 10, version 22H2, see its update history page.

For information about Windows update terminology, see the article about the types of Windows updates and the monthly quality update types.

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

Windows 10 servicing stack update (KB5063706) - 19044.6088 and 19045.6088

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 updates.

This update makes quality improvements to the servicing stack, which is the component that installs Windows updates. To learn more about SSUs, see Servicing stack updates and Servicing Stack Updates (SSU): Frequently Asked Questions.

Known issues in this update

Symptoms

There are reports of blurry or unclear CJK (Chinese, Japanese, Korean) text when displayed at 96 DPI (100% scaling) in Chromium-based browsers such as Microsoft Edge and Google Chrome. The March 2025 Preview Update introduced Noto fonts in collaboration with Google, for CJK languages as fallbacks to improve text rendering when websites or apps don’t specify appropriate fonts. The issue is due to limited pixel density at 96 DPI, which can reduce the clarity and alignment of CJK characters. Increasing the display scaling improves clarity by enhancing text rendering.

Workaround

Microsoft has shared its findings on the blurry text issue at 96 DPI, along with potential solutions with Google for further discussion. For additional support, users can report issues related to Noto CJK fonts through the official Google Noto Fonts GitHub repository.

Symptoms

Following installation of this update, there might be issues when using the Microsoft Changjie IME (input method editor) for Traditional Chinese. Reported symptoms include:

Inability to form or select words after typing the full composition (associate phrase window).
Spacebar or blank key not responding.
Incorrect or distorted word outputs.
The conversion candidate window fails to display properly.

Workaround

Windows IME supports a compatibility setting that enables the use of a previous version of an IME instead. Employing this option should help resolve this issue. To revert to the old version of the Microsoft Changjie IME, follow the steps at Revert to a previous version of an input method editor (IME ).

Next step

Microsoft is working on releasing a solution and will provide more information when it is available.

Symptoms

Applying this update, the Windows Emoji Panel (Win + .) search feature no longer works. It has been reported that typing in the search bar results in a message such as "We couldn't find this one" or similar errors, regardless of the search term. The emoji panel itself still opens, and emojis can be selected manually, but the search functionality is completely non-functional.

Next step

Microsoft is working on releasing a solution and will provide more information when it is available.

How to get this update

Before you install this update

Based on your installation scenario, choose one of the following:

For offline OS image servicing:

If your image does not have the July 25, 2023 (KB5028244) or later LCU, you must install the special standalone October 13, 2023 SSU (KB5031539) before installing this update.
For Windows Server Update Services (WSUS) deployment or when installing the standalone package from Microsoft Update Catalog:

If your devices do not have the May 11, 2021 (KB5003173) or later LCU, you must install the special standalone August 10, 2021 SSU (KB5005260) before installing this update.

Install this update

To install this update, use one of the following Windows and Microsoft release channels.

Available	Next Step
	This update will be downloaded and installed automatically from Windows Update and Microsoft Update.

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

A list of the files that are included in this update are provided in a CSV (Comma delimited) (*.csv) file. The file can be opened in a text editor such as Notepad or in Microsoft Excel.

Download Icon Download the file information for this cumulative update KB5062554 now.