May 27, 2025—KB5061977 (OS Build 26100.4066) Out-of-band
Applies To
Windows 11 version 24H2, all editionsRelease Date:
5/27/2025
Version:
OS Build 26100.4066
For information about Windows update terminology, see types of Windows updates and the monthly quality update types. To find an overview, see the update history page for Windows 11, version24H2.  Â
Follow @WindowsUpdate to find out when new content is published to the Windows release health dashboard.Â
 Improvements
This non-security update includes quality improvements. When you install this update:
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[Hyper-V Platform] Fixed: An issue in the direct send path for a guest physical address (GPA) where confidential virtual machines running on Hyper-V with Windows Server 2025 might intermittently stop responding or restart unexpectedly, affecting service availability and requiring manual intervention. This issue primarily affects Azure confidential VMs.
Windows 11 servicing stack update (KB5058523)- 26100.4060
This update makes quality improvements to the servicing stack, which is the component that installs Windows updates. Servicing stack updates (SSU) ensure that you have a robust and reliable servicing stack so that your devices can receive and install Microsoft updates. To learn more about SSUs, see Simplifying on-premises deployment of servicing stack updates.
Known issues in this update
Applies to:Â Enterprise customers and IT admins
Symptoms
After installing KB5055627, you might encounter issues with the Microsoft Print to PDF functionality. Specifically, the Microsoft Print to PDF printer might no longer appear under Settings > Bluetooth & devices > Printers & scanners. You might also notice that enabling the Printing-PrintToPDFServices-Feature returns error code 0x800f0922, which prevents the installation of the Microsoft Print to PDF printer driver located in C:\Windows\System32\DriverStore\FileRepository.
To address this, try enabling the Printing-PrintToPDFServices-Feature using one of the following options:
Option 1: Press Windows + R, type optional features, and enable Microsoft Print to PDF in the Windows Features dialog.
Option 2: Open PowerShell as Administrator and run the following commands:
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Disable-WindowsOptionalFeature -Online -FeatureName Printing-PrintToPDFServices-Features​​​​​​​
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Enable-WindowsOptionalFeature -Online -FeatureName Printing-PrintToPDFServices-Features
Note:Â The final command might encounter an error with code 0x800f0922.
Workaround
This issue is addressed in KB5060829.
How to get this update
​​​​​​​Before you install this update
Microsoft combines the latest servicing stack update (SSU) for your operating system with the latest cumulative update (LCU). For general information about SSUs, see Servicing stack updates and Servicing Stack Updates (SSU): Frequently Asked Questions.Â
Install this update
To install this update, use one of the following Windows and Microsoft release channels.
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Before you install this update To get the standalone package(s) for this update, go to the Microsoft Update Catalog website. This KB contains one or more MSU files that require installation in a specific order. Install this update Method 1: Install all MSU files together Download all MSU files for KB5061977 from Microsoft Update Catalog and place them in the same folder (for example, C:/Packages). Use Deployment Image Servicing and Management (DISM.exe) to install the target update. DISM will use the folder specified in PackagePath to discover and install one or more prerequisite MSU files as needed. Updating Windows PC To apply this update to a running Windows PC, run the following command from an elevated Command Prompt:
Or, run the following command from an elevated Windows PowerShell prompt:
Updating Windows Installation media To apply this update to Windows Installation media, see Update Windows installation media with Dynamic Update. Note: When downloading other Dynamic Update packages, ensure they match the same month as this KB. If the SafeOS Dynamic Update or Setup Dynamic Update is not available for the same month as this KB, use the most recently published version of each. To add this update to a mounted image, run the following command from an elevated Command Prompt:
Or, run the following command from an elevated Windows PowerShell prompt:
​​​​​​​Method 2: Install each MSU file individually in order Download and install each MSU file individually using DISM or Windows Update Standalone Installer in the following order:
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1 This latest cumulative update includes updates for AI components. Even though the AI component updates are included in the update, the AI components are only applicable to Windows Copilot+ PCs and will not install on Windows PC or Windows Server.
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If you want to remove the LCU
To remove the LCU after installing the combined SSU and LCU package, use the DISM/Remove-Package command line option with the LCU package name as the argument. You can find the package name by using this command: DISM /online /get-packages.
Running Windows Update Standalone Installer (wusa.exe) with the /uninstall switch on the combined package will not work because the combined package contains the SSU. You cannot remove the SSU from the system after installation.
File information
For a list of the files in this update, download the file information for cumulative update 5061977.Â
For a list of the files in the servicing stack update, download the file information for the SSU (KB5058523) - version 26100.4060. Â
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