October 12, 2021 - KB5005537 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 11
The October 12, 2021 update for Windows 11 includes cumulative reliability improvements in .NET Framework 3.5 and 4.8. 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.
Quality and reliability improvements1 Common Language Runtime (CLR)
CLR1 - The existing memory pressure algorithm used in the GC.AddMemoryPressure API is triggering induced GC too aggressively. This update provides an alternative algorithm that is less aggressive. An application can opt into the new algorithm, by setting:
COMPlus_GCNewMemoryPressure environment variable to 1
This is applicable for any application that use the GC.AddMemoryPressure API.
How to get this updateInstall this update
Release Channel Available Next Step Windows Update and Microsoft Update Yes To download and install this update, go to Settings > Update & Security > Windows Update, and then select Check for updates. 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 update will automatically sync with WSUS if you configure Products and Classifications as follows:
Product: Windows 11
Classification: Security Updates
For a list of the files that are provided in this update, download the file information for cumulative update.
PrerequisitesTo apply this update, you must have .NET Framework 3.5 or 4.8 for Windows 11 installed.
Restart requirementYou 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.
How to obtain help and support for this update
- Help for installing updates: Windows Update FAQ
- Protect yourself online and at home: Windows Security support
- Local support according to your country: International Support
Known issues in this updateMicrosoft is not currently aware of any issues in this update.
Source: October 12, 2021-KB5005537 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 11
Yesterday, we released the October 2021 Security and Quality Rollup for .NET Framework. Security The October Security and Quality Rollup does not contain any new security fixes. See February 2021 Security and Quality Rollup for the latest security updates. Quality and Reliability This release...
Direct download links for KB5005537 MSU file from Microsoft Update Catalog:
Download KB5005537 MSU for Windows 11 64-bit (x64) - 45.1 MB
Download KB5005537 MSU for Windows 11 ARM64 - 45.1 MB