Releasing Windows 10 Build 19043.985 (21H1) to Beta & Release Preview Channels

Hello Windows Insiders, today we’re releasing 21H1 Build 19043.985 (KB5003173) to the Beta Channel & Release Preview Channel for those Insiders who are on 21H1. See our blog post here on preparing the Windows 10 May 2021 Update (21H1) for release.

This security update includes quality improvements. Key changes include:

  • Security updates to Windows App Platform and Frameworks, the Windows Kernel, Windows Media, the Microsoft Scripting Engine, and the Windows Silicon Platform.

For more information about the resolved security vulnerabilities, please refer to the new Security Update Guide website.

Please note it may take up to an hour after going live for the KB article to show up on the Windows 10 update history page.

The Windows Insider Program Team