Help: What is the administrator password? What if I've never set i
 

I have heard of the "administrator password" for a super-administrator.

But I have never "set" the "administrator password" or "super admin password".

I do, however, have a user account with admin privileges that I set a
password to.

Is that the same thing? Does my creating a user account with admin
privileges and password make the password for the super-admin the same, or
will the vista admin password still remain blank?

I'm wondering if this is the case, if a hacker tried to break into my system
to grab files, if I never set the administrator/super-admin password, does
that mean there is none, and they just walk right in,

or does it default to the password I have on my user account with admin
privileges?

Thank you again for your help!