Microsoft has released version 2504 of Validation OS, a streamlined version of Windows 11 designed for hardware validation, error diagnosis, and quality control in Windows device production. This version includes enhancements in .NET support, driver management, and USB boot capabilities. It operates through a command-line interface (CLI) and supports Win32 applications. Key features of the 2504 release include support for WPF applications via the Microsoft-WinVOS-WPF-Support package, inclusion of Surface Dock drivers, improved USB boot functionality with RAM disk size configuration through DISM, separation of CJK fonts from the general font package, and an upgrade to the latest .NET implementation. Some known issues remain, such as instability with Bluetooth and Serial Console packages on ARM64 systems. The update builds on previous releases that added features like the Out of Box Experience (OOBE) and Hyper-V-compatible VHDX images. Validation OS is not intended for end users but benefits manufacturers and IT professionals in hardware production and validation. The latest build is available for download from Microsoft's official page.