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Release Date:
February 4, 2022

.NET Framework 4.8

The February 4, 2022 update for Windows 10, version 1809 and Server 2019 includes improvements in .NET Framework 4.8. Before you install this update, see the Prerequisites and Restart requirement sections.


Security improvements

There are no new security improvements in this release.

Quality and reliability improvements


- Addresses an issue where after customers install the January 11th Security update and/or the January 18th update, applications that leverage .NET Framework System.DirectoryServices APIs specific to acquiring or setting Forest Trust Information may fail or crash with various errors, including an access violation (0xc0000005)

1 Directory Services (DS)

Known issues in this update


Installing the latest .NET Framework February 2022 cumulative update will uninstall this update.


Reinstall this update after installing the latest .NET Framework cumulative update.

How to get this update

Install this update

Release Channel


Next Step

Windows Update and Microsoft Update


None.  These changes will be included in the next update to this channel.

Windows Update for Business


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


To get the standalone package for this update, go to the Microsoft Update Catalog website.

Windows Server Update Services (WSUS)


You can manually import these updates into Windows Server Update Services (WSUS) and Microsoft Endpoint Configuration Manager. For WSUS instructions, see WSUS and the Catalog Site. For Configuration Manger instructions, see Import updates from the Microsoft Update Catalog.

File information

For a list of the files that are provided in this update, download the file information for update.


To apply this update, you must have .NET Framework 4.8 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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