Servicing stack updates (SSU) ensure that you have a robust and reliable servicing stack so that your devices can receive and install Microsoft updates. This update makes quality improvements to the servicing stack, which is the component that installs Windows updates. Windows 11 servicing stack update - 22621.1771 If you installed earlier updates, only the new updates contained in this package will be downloaded and installed on your device.įor more information about security vulnerabilities, please refer to the Security Update Guide website and the June 2023 Security Updates.

This update addresses an issue that affects the Windows Kernel. The issue occurs because of unsupported use of the registry. This update addresses a compatibility issue. You might receive the error, 'Document not saved.' For Microsoft Office apps, this issue only affects the 32-bit versions.

If you use some commercial or enterprise security software that uses extended file attributes, this issue will likely affect you. You might have issues when you save, copy, or attach files.

This update addresses a known issue that affects 32-bit apps that are large address aware and use the CopyFile API. This security update includes improvements that were a part of update KB5026446 (released May 24, 2023). When you install this KB: This update addresses security issues for your Windows operating system.

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