Beep.
The error code is a direct pass-through from the CreateFile API. portmon error 2
If you encounter Portmon Error 2, here is the cheat sheet for your own investigation: portmon error 2
In the language of the Windows Operating System, Error 2 translates to portmon error 2
: Ensure the .exe is saved and run from a local folder (like your desktop) rather than a network drive or temporary zip folder. Recommended Alternatives for Modern Windows
: Running Portmon from a network share or untrusted location can break the "security trust," preventing it from finding or loading its required dependencies. Potential Fixes