pe the following commands, pressing ENTER after each command: gpupdate exit
Start the Active Directory Users and Computers snap-in.
In the console tree, right-click your domain or the organizational unit that contains the Group Policy that you want, and then click Properties.
Click the Group Policy tab, click the Group Policy object that you want, and then click Edit.
Expand Computer Configuration, expand Windows Settings, expand Security Settings, expand Local Policies, and then click Security Options.
In the right pane, double-click Accounts: Rename administrator account.
Click to clear the Define this policy setting check box, and then click OK.
Double-click Accounts: Rename guest account.
Click to clear the Define this policy setting check box, and then click OK.
Click OK, and then quit the Group Policy Object Editor snap-in.
Quit the Active Directory Users and Computers snap-in.