Microsoft Support:
March 26, 2024 - KB5036581 Cumulative Update Preview for .NET Framework 3.5 and 4.8.1 for Windows 11, version 22H2
The March 26, 2024 update for Windows 11, version 22H2 includes security and cumulative reliability improvements in .NET Framework 3.5 and 4.8.1. We recommend that you apply this update as part of your regular maintenance routines. Before you install this update, see the Prerequisites and Restart requirement sections.
Summary
Security ImprovementsThere are no new security improvements in this release. This update is cumulative and contains all previously released security improvements.
Quality and Reliability Improvements
There are no new Quality and Reliability Improvements in this update.
| .NET Libraries | - Addresses a performance issue in ASP.NET applications after installing the January 2024 .NET Framework update. |
| .NET Runtime | - Addresses an issue when thread pool recycled lists become unresponsive on multi-CPU-group computers. - Addresses an issue where Interlocked.Read from 32-bit apps are much slower on some computers. |
| .NET Compilers | - Addresses an issue when using the native C# compiler (csc.exe) to compile code making calls to COM interop assemblies. |
Known issues in this update
Microsoft is not currently aware of any issues in this update.How to get this update
Install this update| Release Channel | Available | Next Step |
| Windows Update and Microsoft Update | Yes | Go to Settings > Update & Security > Windows Update. In the Optional updates available area, you’ll find the link to download and install the update. |
| Windows Update for Business | Yes | Go to Settings > Update & Security > Windows Update. In the Optional updates available area, you’ll find the link to download and install the update. |
| Microsoft Update Catalog | Yes | To get the standalone package for this update, go to the Microsoft Update Catalog website. |
| Windows Server Update Services (WSUS) | No | You can import this update into WSUS manually. See the Microsoft Update Catalog for instructions. |
File information
For a list of the files that are provided in this update, download the file information for cumulative update.
Prerequisites
To apply this update, you must have .NET Framework 3.5 or 4.8.1 installed.Restart requirement
You must restart the computer after you apply this update if any affected files are being used. We recommend that you exit all .NET Framework-based applications before you apply this update. Source:
.NET Framework - March 2024 Cumulative Update Preview - .NET Blog
March 2024 Cumulative Update Preview Updates for .NET Framework
devblogs.microsoft.com
Check for and Install Optional Updates in Windows 11 Tutorial
This tutorial will show you how to check for and install optional updates in Windows 11. In Windows 11, you decide when and how to get the latest updates to keep your device running smoothly and securely. When you update, you'll get the latest fixes and security improvements, helping your...
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