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Validation OS 2025.04 release notes

The following release notes identify the new features, open issues, and resolved issues for the 2504 release of the Microsoft Validation OS. Before utilizing this new version, review the information contained in these release notes.

This article applies to the Validation OS 2504 release, corresponding to the ISOs with the prefix "26100.3916.250422-2254".

What's new

  • Windows Hardware Lab Kit on Validation OS enhancements:
    • Added Surface Dock specific drivers to the Microsoft-WinVOS-DriversPack-A package
  • Added basic support to run some WPF applications along with sufficient support to run .NET (former ".NET core") and WPF on .NET (former "WPF on .NET core") via the Microsoft-WinVOS-WPF-Support optional package (under the Extras CAB directory)
  • Migrated to the latest most secure and performant .NET implementation
  • Split Chinese, Japanese, and Korean TrueType support from Microsoft-WinVOS-Fonts into Microsoft-WinVOS-CJKFonts
  • Added support to ‘DISM.exe /Image: /Set-ScratchSpace’ on Validation OS when booting from USB to configure RAM-DISK size via the Microsoft-WinVOS-Provisioning package

Issues Fixed

  • Enhancements and bug fixes

Known Issues

  • When including both Microsoft-OneCore-SerialConsole-Package and Microsoft-WinVOS-Bluetooth-Package on certain ARM64 systems, the machine will become unstable and can crash.