Significa que la ruta en el Paso 2 no es correcta. Verifica si tu Office está instalado en otra unidad o busca la carpeta Office16 manualmente.

Run the activation command:

The location of the OSPP.VBS script depends on your system architecture (32-bit vs 64-bit). Use the corresponding command below: Office Activation Command by Omman - GitHub Gist

A simple batch file to activate Microsoft Office 2016 · GitHub