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 improvements
| 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. |
1 Common Language Runtime (CLR)
How to get this update
Install 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 |
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 for Windows 11 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.
How to obtain help and support for this update
Known issues in this update
Microsoft is not currently aware of any issues in this update.
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