Installing JEDI One as a service makes it available anytime the PC is running. The service is installed and started from a command prompt run as administrator as detailed in this video (this only needs to be done once):
JEDI One is now running and you can access it via a browser at: http://127.0.0.1:9123 on the PC where it is running as a service or http://<your PC's IP address>:9123. See this article for more details:
Connecting to JEDI One for the first time