Highlights

• This update addresses security issues for your Windows operating system. 

Improvements 

This security update includes quality improvements. When you install this KB: 

• This update addresses an issue that affectslsass.exe. It stops responding. This occurs after you install the April 2024 security updates on Windows servers.

• This update addresses an issue that affectslsass.exe. It leaks memory. This occurs during a Local Security Authority (Domain Policy) Remote Protocol (LSARPC) call.

• Starting in this update, File Explorer adds the Mark of the Web (MoTW) tag to files and folders that come from untrusted locations. When MapUrlToZone classifies a file as “Internet,” that file also gets this tag. Because of this change, the “LastWriteTime” time stamp is updated. This might affect some scenarios that rely on file copy operations.

If you installed earlier updates, only the new updates contained in this package will be downloaded and installed on your device.

For more information about security vulnerabilities, please refer to the newSecurity Update Guide website and theJune 2024 Security Updates.

Known issues in this update

Microsoft is not currently aware of any issues with this update.

How to get this update

EXPIRATION NOTICE

IMPORTANT As of January 27, 2026, this update is no longer available from the Microsoft Update Catalog or other release channels. We recommend that you update your devices to the latest version of Windows.