I've got XP Pro set up with two user accounts, one account with Administrator
rights (mine) and one with Limited Rights (girlfriend). The PC is always on,
but normally sits on the "Select User" login page with nobody logged in, when
not being used.

If I schedule Windows Backup jobs to backup files to a NAS device overnight,
and set them to run using my administrator account on the machine, should
they still run even though my account is logged out ? At the moment they seem
to be failing, but I'm not sure whether this is because the account needs to
be logged in at the time they run.