For security reasons, Windows 7 hides the super Administrator Account (Administrator) and does not allow "common users" to log on to Windows 7. To log on to the Windows 7 super Administrator account, you must first enable this super administrator account. How to enable the super Administrator Account of Windows 7? Similar to Vista.
First, disable UAC. In the control panel-in the user account-select "open or close User Account Control" to remove the check box and restart the computer (for security reasons, if you are not familiar with the computer, use the super Administrator Account and disable UAC), and then follow the nine steps below.
1. log on to Windows 7 using the account created during installation.
2. Start -- allProgram-- Attachment, right-click "command prompt", select "Run as administrator", and "allow ".
3. In the open Command Prompt window, enter "Regedit" and press enter to open the Registry Program window.
4. Go to HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ Windows NT \ CurrentVersion \ Winlogon
5. Right-click Winlogon to create a new item (k) named specialaccounts.
6. Right-click specialaccounts to create a new item (k) named userlist.
7. Right-click userlist to create a DWORD (32-bit) value (d) with the name administrator and key value 1.
8. In the Command Prompt window, enter: Net user administrator/active: Yes and press Enter. A success prompt is displayed.
9. log out or restart, and the super administrator account is displayed! No password by default. you can log on!
To view the user group, enter control userpasswords2 in the Command Prompt window. If you want to disable it, enter: Net user administrator/active: No in command line cmd.
10. log in with the super administrator account and delete the account during system installation (remember to delete the relevant documents of the account, such as desktop and my documents, before deleting the account ).