Is it possible to change the name of the hidden system administrator in Vista?

Depending on what version you have, right click 'my computer' and select 'manage'

in left side of the new console window expand 'local users and groups'>select 'users'

The user accounts should show in the main window, right click administrator and rename it. By default Vista has this account disabled for security reasons.

*sighs* and you're using home basic ignore the above.

make sure the account you are using has administrator rights, then:
- click start
- in the search bar type "cmd" (no quotes), the shortcut to a prompt link will be on your menu, run it

In the prompt window type in (no quotes) "net user Administrator /active:yes"

Now you should be able to see the administrator account in the users control panel applet. Play as you want.

NOTE: Vista does have this account disabled for your own protection. Enabling the account will open yourself up to many vulnerabilities. You can assign administrator rights to other computer users. It's best to leave it as it is. If you still intend to enable the account, make sure to also set a strong password (upper case, lower case, symbols, numbers, more than 8 characters long password).

***disclaimer***
If you break anything using the administrator account or break the administrator account its not my fault. You have been warned against using it