: On older systems, the tool sometimes fails if you aren't using Internet Explorer with the correct ActiveX plugins enabled. How to Fix or Bypass the Error
: 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. : On older systems, the tool sometimes fails
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 This diagnostic tool was originally designed to verify
:If you're facing persistent "non-genuine" notifications, some experts suggest clearing the Software Protection Platform cache by deleting the Tokens.dat file (backup first!). Summary Table: Tools by OS Version Operating System Recommended Diagnostic Tool Windows XP / Vista / 7 MGADiag.exe (Legacy) Windows 8 / 8.1 Licensingdiag.exe Windows 10 / 11 Activation Troubleshooter (Settings) Microsoft Genuine Advantage Diagnostics Tool Summary Table: Tools by OS Version Operating System
:If you actually are on Windows 7 or older, ensure you are running the tool with full administrative privileges.
If you need to diagnose activation issues on a modern OS, stop using the MGA Diagnostic Tool and try these instead:
:Go to Start > Settings > Update & Security > Activation . Windows 10 and 11 have built-in troubleshooters that replace the old standalone tools.