August 26, 2025—KB5064080 (OS Build 22621.5840) Preview
Applies to: Windows 11 version 23H2, all editions
Highlights: This non-security update includes quality improvements and introduces a new feature for organizations.
New Features:
Windows Backup for Organizations
Windows Backup for Organizations is now generally available, providing seamless device transitions with enterprise-grade backup and restore capabilities. This solution helps maintain productivity with minimal disruption, ensuring business continuity and organizational resilience when refreshing devices, upgrading to Windows 11, or deploying AI-powered PCs.
Important: To update to Windows 11 version 23H2, use EKB KB5027397.
Improvements: This non-security update includes quality improvements. The following summary outlines key issues addressed by the KB after you install it, along with available new features.
[Copilot]
- Fixed: Improved the Copilot key's reliability and resolved an issue that prevented users from restarting Copilot after using the key.
[Country and Operator Settings Asset (COSA)]
- Fixed: This update brings profiles up to date for certain mobile operators, ensuring compatibility with latest network settings.
[Device management]
- Fixed: An issue where the removable storage policy didn’t correctly block external devices, such as USB flash drives, while maintaining data security and integrity.
[Family Safety]
- Fixed: An issue where the “Ask to Use” approval prompt didn’t appear when blocked apps were opened. With this fix, apps now show the expected approval prompt when Family Safety settings are enabled, providing a safer browsing experience for family members.
[File Explorer]
- Fixed: File Explorer might unexpectedly only display a single folder (for example, Desktop), rather than the expected content with recent files and more.
- Fixed: Syncing more SharePoint sites to File Explorer might slow performance when navigating folders or opening the context menu. These changes can also affect how quickly files launch.
[File sharing]
- Fixed: This update addresses an issue where accessing files on a Server Message Block (SMB) share over Quick UDP Internet Connections (QUIC) might result in unexpected delays, improving file transfer speed and reliability.
[File system]
- Fixed: This update addresses an issue in Resilient File System (ReFS) where enabling deduplication and compression simultaneously could occasionally cause the system to stop responding, ensuring stable file system operations.
[Input]
- Fixed: This update addresses an issue where certain extended Unicode characters—such as rare Chinese symbols—appeared as blank spaces or incorrect symbols in Windows text boxes. The fix ensures these characters display correctly and maintains compliance with GB18030-2022 requirements.
- Fixed: This update addresses an issue with the Chinese (Simplified) Input Method Editor (IME) where some extended characters appeared as empty boxes, providing a seamless input experience for users.
[Narrator]
- Fixed: This update addresses an issue where Narrator incorrectly read the name of the Enhance Facial Recognition Protection checkbox under the Facial recognition (Windows Hello) setting, improving screen reader functionality.
[Network connectivity]
- Fixed: This update addresses an issue where Wi-Fi might not reconnect automatically after a Group Policy update, ensuring stable network connections and seamless device operation.
[Remote Desktop]
- Fixed: An issue where cameras didn’t appear during remote sessions after being added or removed. Newly connected cameras were not recognized in Remote Desktop Services (RDS) environments, improving collaboration and connectivity features for remote work.
Windows 11 Servicing Stack Update (KB5064743) - 22621.5973: This update makes quality improvements to the servicing stack, which is the component that installs Windows updates. Servicing stack updates ensure that you have a robust and reliable servicing stack so that your devices can receive and install Microsoft updates.
August 26, 2025—KB5064080 (OS Build 22621.5840) Preview
August 26, 2025—KB5064080 (OS Build 22621.5840) Preview - Microsoft Support
