The "Computer ID" is a globally unique name that is assigned to your computer to identify it from all other computers on our backup server.
The Computer ID is assigned to you when your backup service is first configured on our servers. We will then email you the name that was chosen.
NB: You MUST use the Computer ID that was assigned to you in the email when you first install Guardian or your computer will not be able to connect to our backup server(s) !