:For Windows 8 and newer, use the native command-line tool. Open Command Prompt as Administrator and run: Licensingdiag.exe -report %userprofile%\desktop\report.txt This generates a modern diagnostic report directly on your desktop.
This diagnostic tool was originally designed to verify licenses for legacy systems like . Because Microsoft has shifted to newer activation technologies, this specific tool is no longer compatible with modern versions like Windows 10 or 11. Why You're Seeing This Error :For Windows 8 and newer, use the native command-line tool
: The tool (MGADiag.exe) is generally for Windows 7 or older. Running it on Windows 8, 10, or 11 will trigger the "unsupported OS" message. :For Windows 8 and newer
If you need to diagnose activation issues on a modern OS, stop using the MGA Diagnostic Tool and try these instead: :For Windows 8 and newer, use the native command-line tool