Windows 10 KB5062649 fixes Extended Security bug, unresponsive systems, and more

Microsoft has released today the non-security preview update (also known as the C-release) for Windows 10. The update, under KB5062649 and Build 19045.6159, fixes some major bugs including one for Extended Security Updates (ESU), unresponsive systems, Secure Boot, and more. Since this is a preview update for next month's Patch Tuesday it is an optional release.

Microsoft says that users reported that the ESU wizard would not work correctly when they tried to use the option to extend support for Windows 10 for another year; this bug should be fixed now. The company has also fixed "stability issues" with this release as it resolves problems in the core file system. Affected users reported unresponsive systems since the May 2025 Patch Tuesday.

There are other improvements as well. The full changelog is given below:

• [Extended Security Updates] Fixed: 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.

   

• [Core File Systems] Fixed: 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.

   

• [Input]

   

  • Fixed: A known issue with the Microsoft Changjie Input Method. Users were unable to select words after a recent update.

  • Fixed: A known issue when searching for an emoji in the emoji panel. After a recent update, the search always returns no results.

  • Fixed: An issue in which phonetic input methods, including the Hindi Phonetic Input keyboard and Marathi Phonetic keyboard do not work correctly after a recent update.

     

You can find the official support article here on Microsoft's website.

Source

Hope you enjoyed this news post.

Posted Wednesday 23 July 2025 at 1:07 pm AEST (my time).

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