Microsoft has released a new update for Windows 11 users that addresses an issue with the Secure Socket Layer (SSL) and Transport Layer Security (TLS) connectivity. The latest update is rolling out as KB5020387 to Windows 11 version 21H2.

 

Along with this, Microsoft also released Windows 10 build 19042.2132, 19043.2132, and 19044.2132 as KB5020435 update.

 

Windows 11 KB5020387 update fixes SSL/TLS network issues

 

What's new and improved in Windows 11 KB5020387 update

With the release of Windows 11 build 22000.1100, Microsoft addresses an issue in the Windows 11 Operating System that might have affected some types of SSL and TLS connections.

 

Microsoft said that these connections might have failed while performing a handshake.

 

For developers, the affected connections are likely to receive one or more records followed by a partial record with a size of fewer than 5 bytes within a single input buffer, says Microsoft.

 

 

How to download Windows 11 KB5020387 update (offline installer)

You should have received this update notification if your Windows Update service is enabled. If not, open the Windows 11 Settings app, navigate to Windows Update and click the "Check for Updates" button.

 

If you own multiple Windows 11 devices or would like to patch the systems manually, you can download the offline installer by clicking here. This is an official direct download link for Windows 11 KB5020387 update.

 


Kunal Chowdhury

About the Author

Solution Architect & Former Microsoft MVP

Kunal Chowdhury is an enterprise solution architect and former multi-year Microsoft MVP. He is the author of three technical books: Windows Presentation Foundation Development Cookbook, Mastering Visual Studio 2017, and the Mastering Visual Studio 2019.

He publishes technical and non-technical articles on .