Accounts: Rename guest account

This security setting determines whether a different account name is associated with the security identifier (SID) for the account "Guest." Renaming the well-known Guest account makes it slightly more difficult for unauthorized persons to guess this user name and password combination.

Policy path: 

Computer Configuration\Windows Settings\Local Policies\Security Options

Default: 

Guest

Supported on: 

At least Windows XP SP2, Windows Server 2003

Registry settings: 

Not a registry key

Reboot required: 

No