KB4586876 for .NET Framework 4.8 , 3.5 for Windows 10 2004 and 20H2

Just now we have covered KB4592784 that refers to Windows Feature Experience Pack 120.2212.1070.0. On the same date aka 30 Nov 30, 2020, a Cumulative Update Preview for .NET Framework 4.8 and 3.5 for Windows 10 2004 and 20H2 is rolling out.

This is KB4586876 to update as a part of regular maintenance routines.

Table of Contents

KB4586876 for .NET Framework 4.8 , 3.5 for Windows 10 2004 and 20H2

Here is the changelog –

WPF¹	Addresses an issue in which a FailFast crash occurs in apps that have two threads that both load application resources.
Runtime	Improves the clean-up process for X509Certificate2 certificates.

How to download the LCU and install

Through auto Windows update

Click the – Start.
Type – updates.
Select – Check for updates.
After a while, the system will download the LCU; click – Install now.

Via Microsoft update catalog

Go to the KB4586876 direct download link – http://www.catalog.update.microsoft.com/Search.aspx?q=4586876.
Locate the correct file such as having x.64, x86, or ARM for your system.
Click the – Download.
Right-click on the download .msu file and select Open.
Follow the guide on the screen and complete the installation of the patch.

1] KB4576478 .NET Framework 4.8 and 3.5 Update Windows 10 2004
2] KB4562899 .NET Framework 4.8, 3.5 update Windows 10 2004
3] KB4569745 .NET Framework 4.8, 3.5 update for Windows 10 2004 August 2020
4] KB4555452 .NET Framework 4.8 and 3.5 Windows 10 2004