In Windows XP Home Edition, you can login as built-in Administrator in Safe
Mode only. For XP Professional, press CTRL+ALT+DEL twice and input your
Administrator password in the classic logon window that appears. The
built-in Administrator account should only be used for management purposes,
and not for routine usage. To have the Administrator account display in the
Welcome Screen. (FYI, and optional), see: http://www.mvps.org/sramesh2k/admins.htm