(If you are using a non-built administrator package, please skip this step. ) After the installation is completed, use to activate the built-in administrator, log off, use the user account to delete the created users and user files, and open the permissions of the built-in administrator. The location is gpedit.msc- computer configuration -Windows settings-security settings-local policy-security policy-user account control: use management approval mode for built-in administrator account-set to enabled.