Open an administrative command prompt by searching for 'cmd' in your start menu, right-clicking “Command Prompt”, and choosing Run As Administrator.

Change to your ARDI installation directory. If you've installed to C:\ARDI, do the following…

cd c:\ardi\drivers\nssm\win64
nssm create "Grafana"

A window will appear.

In path, enter the full path to your Grafana executable, usually in the /bin folder.