My password won't allow superuser access
I have never set up any other password, yet I'm asked for Root password and therefore locked out from superuser.
This is my own personal computer at home and there is no other O/S installed.
My password works for almost anything else I've needed it for so far but I can't install my printer driver, or access su, or any of its other related privileges.
I'm really trying to get a grip on this O/S, so any help would be really appreciated.