When you install XP, either version, you get a builtin admin account
named "Administrator". This account is partially hidden. It is only
accessible in Home Edition through a safe mode boot and in Pro it is
hidden by default from the Welcome Screen.
Many OEM installs come with an initial "Owner" account, which is a good
candidate for your workday admin account. The retail version of XP will
hide the Administrator account as soon as you create another account. If
you create several accounts during setup and never logon to
Administrator, you won't see the Administrator profile.
If you have an admin account that is not "Administrator" then you have
two. If you have more than two, you have to wonder why, since viruses
and trojans are limited in the damage they can do if they are initiated
by limited accounts.
So the typical system should have Administrator, reserved for emergency
recovery, a routine maintenance admin account and one or more limited
user accounts.
--
Kent W. England, MS MVP for Windows XP