August 20, 2020 - KB4570723 Cumulative Update Preview for .NET Framework 3.5 and 4.8 for Windows 10 Version 1903, Windows Server 1903 RTM, Windows 10, version 1909 and Windows Server, version 1909

The August 20, 2020 update for Windows 10 Version 1903, Windows Server 1903 RTM, Windows 10, version 1909 and Windows Server, version 1909 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	- Addresses an issue in some 32 bit apps where, in certain scenarios, the JIT might omit a function call - Improved support for cleaning up private temporary certificate keys
WPF2	- Addresses an issue with a null-reference crash in automation code, arising from re-entrancy when reconnection to a remote desktop.

1 Common Language Runtime (CLR)
2 Windows Presentation Foundation (WPF)

How to obtain and install the 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)	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 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: https://support.microsoft.com/en-us/help/4570723


Direct download links for KB4570723 MSU file from Microsoft Update Catalog:

Download KB4570723 MSU for Windows 10 v1903 and v1909 32-bit (x86) - 43.2 MB

Download KB4570723 MSU for Windows 10 v1903 and v1909 64-bit (x64) - 75.8 MB

Download KB4570723 MSU for Windows 10 v1903 and v1909 ARM64 - 43.2 MB

Posted By: Brink
20 Aug 2020