If a computer has more than one user (ie. more than one person can logon to it) then each individual user can have their own configuration settings.
The Backup account will be in the name of the user who purchased it and set up the account.
To share this account with the other computer users the process is as follows.
If 'user A' has purchased DVS backup and wants to allow 'user B' on the computer to use it as well, then 'user B' must log onto the computer using 'user B's' own login, access DVS Backup using start, programs, DVS Backup and the setup wizard will be displayed, but 'user B' must use 'user A' backup login details to validate the account and proceed to setup.
The system will recognise you as a different user from your computer login and you can setup your own backup paramaters which will be separate from 'user A'.