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KB5062649: Windows 10 build 19045.6156 adds Extended Support fix, Secure Boot improvement

windows 10 update

Microsoft has rolled out a new Windows 10 release preview build today for Insiders flighting the channel. The new build, 19045.6156, under KB5062649, has some new changes and improvements. The biggest highlight is a fix related to the recently released ESU wizard that allows users to enroll for the Extended Security Updates (ESU).

Asided from that, the build also adds improvements related to Secure Boot. Microsoft is also promising "stability fixes" after the latest July 2025 Patch Tuesday.

The full changelog is given below:

  • Update resolves an issue impacting the Windows 10 Extended Security Updates (ESU) enrollment wizard. Some users experienced a problem where clicking “Enroll now” caused the wizard window to open, begin loading, and then close unexpectedly. This occurred due to incomplete app registration, which prevented the wizard from loading correctly. This update addresses that issue to ensure a smoother enrollment experience.
  • ​​​​​[Mobile Operator Profiles] Updated: Country and Operator Settings Asset (COSA) profiles.
  • [Secure Boot] New! Adds the ability to deploy SKUSiPolicy VBS Anti-rollback protections through the Secure Boot AvailableUpdates registry key.
  • [Stability issue] Fixed: This update addresses an issue observed in rare cases after installing the May 2025 security update and subsequent updates causing devices to experience stability issues. Some devices became unresponsive and stopped responding in specific scenarios.

You can view the announcement blog post here on Microsoft's official website.

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