Windows 10 KB5062649 addresses security flaws, system issues, and enhancements

Windows 10 KB5062649 addresses security flaws, system issues, and enhancements

Microsoft Rolls Out Windows 10 C-Release Preview Update

Today, Microsoft has unveiled a non-security preview update for Windows 10, designated as the C-release. This update, identified by KB5062649 and Build 19045.6159, addresses several significant issues, ranging from the Extended Security Updates (ESU) complications to unresponsive systems and Secure Boot concerns. As this is a preview release ahead of the upcoming Patch Tuesday, it is available as an optional download for users.

Fixes and Enhancements in the Latest Update

According to Microsoft, users encountered problems with the ESU wizard during their attempts to extend support for Windows 10 by an additional year. This update resolves the underlying issue, ensuring a smoother enrollment process. Additionally, Microsoft has tackled “stability issues”linked to the core file system; many users have reported unresponsive devices following the May 2025 Patch Tuesday update.

Comprehensive Changelog

This update brings forth a variety of improvements and bug fixes. Below is a detailed list of the changes:

  • [Extended Security Updates]

    Resolved a significant issue affecting the Windows 10 Extended Security Updates (ESU) enrollment wizard. Users previously experienced issues where clicking “Enroll now” would cause the wizard to load briefly before unexpectedly closing due to incomplete app registration. This update aims to enhance the enrollment experience.

  • [Mobile Operator Profiles]

    Updated the Country and Operator Settings Asset (COSA) profiles.

  • [Secure Boot]

    New! Introduced the capability to deploy WeUSiPolicy VBS Anti-rollback protections via the Secure Boot AvailableUpdates registry key.

  • [Core File Systems]

    Fixed rare stability issues that emerged post-installation of the May 2025 security update, causing certain devices to become unresponsive in specific scenarios.

  • [Input]

    • Addressed a known issue with the Microsoft Changjie Input Method, where users were unable to select words following a recent update.

    • Resolved a problematic emoji panel search feature that returned zero results after users made recent updates.

    • Fixed phonetic input methods, including the Hindi and Marathi Phonetic keyboards, which were not functioning properly after updates.

Further Information

For more details, you can access the official support article here on Microsoft’s website.

Source & Images

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