Win Update KB5031225 Cumulative Update .NET Framework 3.5, 4.8, and 4.8.1 (21H2)

Brink · Oct 10, 2023

October 10, 2023 - KB5031225 Cumulative Update for .NET Framework 3.5, 4.8 and 4.8.1 for Windows 11, version 21H2

IMPORTANT
This update is included in the Cumulative Update that's dated October 10, 2023. Parts of this update were previously released in the Cumulative Update that's dated September 26, 2023.

Summary
This article describes the security and Cumulative Update for 3.5, 4.8 and 4.8.1 for Windows 11, version 21H2.

Security Improvements

There are no new security improvements in this release. This update is cumulative and contains all previously released security improvements.

Quality and Reliability Improvements

For a list of improvements that were released with this update, please see the article links in the Additional Information section of this article.

Known issues in this update
Microsoft is not currently aware of any issues in this update.

Additional information about this update
The following articles contain additional information about this update as it relates to individual product versions.

5030842 Description of the Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 11, version 21H2 (KB5030842)

5030650 Description of the Cumulative Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 21H2 (KB5030650)

How to get 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 No None. These changes will be included in the next security update to this channel. For more information about Windows Update for Business go to the Windows Update for Business website.
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 operating system update will offer, as applicable, and individual .NET Framework product updates will be installed. For more information about individual .NET Framework product updates see additional information about this update section.
This update will automatically sync with WSUS if you configure as follows:
Product: Windows 11, version 21H2
Classification: Updates