November 10, 2020-KB4585209 Cumulative Update for .NET Framework 4.8 for Windows 10 Version 1709

Release Date:
November 10, 2020

Version:
.NET Framework 4.8

Note On Jan 12, 2020, a live revision was made to this update to remove its supersedence relationship with the October 13, 2020, .NET Framework security updates. If you have already installed this update, the October 13 .NET Framework updates, or any later .NET Framework updates, you do not have to take any action to be up-to-date for the latest .NET Framework security updates. See the “Update replacement information” section in this article for more information for WSUS administrators.

WSUS administrators who cannot install this update and have to reinstate the October 13, 2020, KB 4578971 security update, if it was declined, can follow this guidance: Reinstating declined updates. Then, they should run an update synchronization within their Microsoft Endpoint Configuration Manager, or update management environments, as applicable.

The November 10, 2020 update for Windows 10 Version 1709 includes cumulative reliability improvements in .NET Framework 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

WPF¹	- Addressed a regression from a previous update, arising when two HostVisual elements disconnect at the same time.
SQL	- Addressed an issue in System.Data.SqlClient where querying string columns would fail if the database had a Kazakh collation.

¹ 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 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

Help for installing updates: Windows Update FAQ
Protect yourself online and at home: Windows Security support
Local support according to your country: International Support