Microsoft has recently released an out-of-band (OOB) update for Windows 11, specifically version 24H2, identified as KB5068221 with the build number 26100.6588. This cumulative update is designed to enhance the security and quality of the operating system by addressing critical issues, particularly those affecting Microsoft Office applications in virtualized environments. The update resolves a significant problem linked to a double handle closure within the App-V subsystem components, ensuring smoother functionality for users in such environments.

In addition to security improvements, the update also enhances various AI components, including Image Search, Content Extraction, Semantic Analysis, and the Settings Model, all updated to version 1.2508.906.0. Alongside these features, it introduces a new servicing stack update (KB5064531) that helps ensure devices can reliably receive future updates.

However, the release is not without its challenges. Users may encounter difficulties when attempting to connect to shared files using the deprecated SMB v1 protocol over NetBIOS (NetBT) after installing the update. This issue may arise if the SMB client or server has the September 2025 security update installed. To workaround this connectivity issue, users can enable network traffic on TCP port 445, facilitating a switch to TCP for the SMB connection, thereby allowing successful reconnections.

While Microsoft is actively working on a permanent fix for the SMB v1 connectivity problem, users are encouraged to transition to newer protocol versions (SMB v2 or SMB v3) since SMB v1 is no longer installed by default in modern Windows versions due to its security vulnerabilities.

In conclusion, the KB5068221 update is a critical step in enhancing the functionality and security of Windows 11, even as users navigate some temporary connectivity challenges. Microsoft’s commitment to resolving these issues and improving the overall user experience remains a priority. Future updates are expected to provide further enhancements and fixes as they continue to refine the operating system

Windows 11 KB5068221 (OS Build 26100.6588) released

Microsoft has released an out-of-band (OOB) update for Windows 11 24H2, which includes essential security fixes and quality improvements. The update addresses a critical issue affecting Microsoft Office applications running in virtualized environments and brings updates to various AI components, including Image Search, Content Extraction, Semantic Analysis, and Settings Model. However, users may experience difficulties connecting to shared files using the SMB v1 protocol on NetBIOS over TCP/IP (NetBT) after installing this update. Until an upcoming Windows update implements a permanent resolution, users can temporarily enable network traffic on TCP port 445 as a workaround.

Windows 11 KB5068221 (OS Build 26100.6588) released @ NT Compatible