With Microsoft's Windows 7 operation system installed on your computer, you can use the Registry Editor application to view all of the preferences for you system. As an administrator, you also change values in the User List to create a new administrator account on the same computer. It's important for any user to take extreme caution when editing the computer's registry as any small changes could cause severe technical issues for the system.
Click the "Start" button from the Windows task bar at the bottom of the desktop and then click the "All Programs" option. Click the "Accessories" option.
Right-click the "Command Prompt" option and then select the "Run as administrator" option. Enter your administrator password, if prompted.
Enter "regedit.exe" into the command line of the Command Prompt window that appears and then press the "Enter" key on your keyboard.
Click the "HKEY_LOCAL_MACHINE" option and then click the "SOFTWARE" option. Click the "Microsoft" option and then select the "Windows NT" option.
Click the "CurrentVersion" option and then click the "Winlogon" option. Select the "SpecialAccounts" option and then click the "UserList" option.
Double-click the "UserList" file and then click on any blank space in the right pane. Click the "New" option and then click the "DWORD (32-bit) Value" option.
Enter the user name for the administrator account, and then double-click the DWORD registry value. Enter "0" into the text box and then click the "OK" button.
Close out of the Registry Editor application and then restart your computer. The administrator account will then be created.