In the following simple solution, I will show you how to login to Windows Vista as Administrator. By default, the Windows Vista Administrative account is disabled and the Administrator user account does not appear during login. However, enabling the admin account to be accessible at login is not very complicated.
Enabling the Administrator account at Vista Login
From the Taskbar, click Start
Type Computer Management in the “StartÂ Search” box and press Enter
From the Computer Management Menu, (1) click Local Users and Groups, then Users, (2) double click Administrator, (3) UncheckAccount is Disabled. (4) click OK:
Now simply restart your computer and you should be presented with the option to Login as Administrator