Microsoft has released the KB5062663 update for Windows 11, introducing OS Builds 22621.5699 and 22631.5699. This preview update focuses on enhancing system stability, security, and user experience through a series of targeted improvements and fixes.
In summary, the KB5062663 update for Windows 11 brings significant improvements in security, system stability, and user experience. By addressing critical issues and enhancing existing features, Microsoft continues to refine the Windows 11 operating system to meet the evolving needs of its user base.
Source: Microsoft Support July 22, 2025—KB5062663 (OS Builds 22621.5699 and 22631.5699) Preview - Microsoft Support
Key Enhancements and Fixes
Secure Boot and Anti-Rollback Protections
The update strengthens system security by enhancing Secure Boot mechanisms, specifically through the implementation of SKUSiPolicy Virtualization-Based Security (VBS) Anti-rollback protections. Administrators can now configure these protections using the Secure Boot AvailableUpdates registry key, providing greater control over device integrity. Anti-rollback technology prevents systems from reverting to older, potentially vulnerable firmware versions, thereby bolstering defense against firmware-level attacks.Resilient File System (ReFS) Improvements
An issue within the Resilient File System that caused backup applications handling large files to exhaust system memory has been addressed. This fix ensures more reliable backup operations, which are critical for data integrity and business continuity.PDF Search Functionality
The update resolves errors encountered when searching for PDF files in shared folders, such as "No More Files" or "STATUS_NO_MORE_FILES." These errors previously disrupted virtual PDF printing and backup processes. With this fix, users can expect more accurate search results and smoother document management workflows.Networking Enhancements
A fix has been implemented to reduce the time peripheral devices take to become operational after resuming from hibernation on systems with active cellular connections. This improvement enhances the responsiveness and reliability of connected devices, particularly in mobile computing environments.Printer Discovery and Naming
The update improves the clarity of printer names during setup using Internet Printing Protocol (IPP) Directed Discovery. This enhancement simplifies the identification and configuration of printers, reducing setup errors and improving user experience.System Stability Post-May 2025 Update
An issue that caused some devices to become unresponsive after installing the May 2025 security update has been addressed. This fix ensures that systems remain stable and responsive following security updates, maintaining operational continuity.Deployment and User Experience
The KB5062663 update is available through Windows Update and the Microsoft Update Catalog. Users are encouraged to install this update to benefit from the latest improvements and fixes. As with any update, it's advisable to back up important data before installation and monitor system performance post-update to ensure all enhancements function as intended.In summary, the KB5062663 update for Windows 11 brings significant improvements in security, system stability, and user experience. By addressing critical issues and enhancing existing features, Microsoft continues to refine the Windows 11 operating system to meet the evolving needs of its user base.
Source: Microsoft Support July 22, 2025—KB5062663 (OS Builds 22621.5699 and 22631.5699) Preview - Microsoft Support
