Important
Free support for Windows 10 Enterprise LTSC 2021 will soon end. For information about the availability of Extended Security Updates (ESUs), see the End of support section.
Summary
This update addresses security vulnerabilities in Windows setup binaries or any files that setup uses for feature updates in Windows 10, version 21H2 and Windows 10, version 22H2.
How to get this update
Install this update
To install this update, use one of the following release channels.
| Available | Next step |
|---|---|
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This update is available through Windows Update. It will be downloaded and installed automatically. |
About this update
| Item | Details |
|---|---|
| Prerequisites | There are no prerequisites to apply this update. |
| Restart information | You do not have to restart your computer after you apply this update. |
| Update replacement information | This update replaces the previously released update KB5074207. |
| 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. Note: The English (United States) version of this software update might contain files for additional languages. 
Download the file information for update KB5126029. |
References
Related topics
- End of support
Microsoft will no longer provide free software updates from Windows Update, technical assistance, or security fixes on the following end dates. To continue to receive critical and important security updates for Windows 10, see Windows 10 Extended Security Updates (ESU). Otherwise, we recommend you upgrade to a later version of Windows.- Windows 10, version 21H2: Support ended on June 13, 2023
- Windows 10, version 22H2: Support ended on October 14, 2025
- Extended Security Updates (ESU) program for Windows 10
- Windows 10 Enterprise LTSC 2021: January 12, 2027. For information about the Extended Security Updates (ESU) program, see Plan for Windows 10 Enterprise LTSC 2021 end of support
- Windows 10 IoT Enterprise LTSC 2021: January 13, 2032
Query words: Setup DU