KB5082241: Safe OS Dynamic Update for Windows 10, versions 21H2 and 22H2: April 14, 2026

Applies To
Windows 10 Enterprise LTSC 2021 Windows 10 ESU

Windows Secure Boot certificate expiration

Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot securely if not updated in time. To avoid disruption, we recommend reviewing the guidance and taking action to update certificates in advance. For details and preparation steps, see Windows Secure Boot certificate expiration and CA updates.

Summary

This update makes improvements to the Windows recovery environment (WinRE).

How to get this update

Install this update

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


Available Next step
Available This update will be downloaded and installed automatically by Windows Recovery Environment update KB5087371.

More information about this update

Prerequisites There are no prerequisites to apply this update.
Restart information You do not have to restart your device after you apply this update.
Removal information This update cannot be removed once it is applied to a Windows image.
Update replacement information This update replaces the previously released update KB5078884.
Verify the installation of this update After installing this update, the WinRE version installed on the device should be 10.0.19041.7177. To find the WinRE version installed, see Methods to verify the WinRE version installed.
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 Icon Download the file information for update KB5082241.
End of support Microsoft will no longer provide free software updates from Windows Update, technical assistance, or security fixes on the following end dates: Note: 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.

References

Description of the standard terminology that is used to describe Microsoft software updates

Query words: safeos du