Enable administrator for Windows 7 flagship Edition
Step 1: Press and hold the winkey + R on the keyboard at the same time to display the run dialog box. Enter lusrmgr. MSC and press Enter.
Step 2: You will see the account manager, double-click the user, right-click the Administrator on the right, and select Properties
Remove the check box before "Account Disabled". OK, the super Administrator account is enabled.
If you want to delete a user you created previously, you only need to right-click the user name and delete it from the menu that appears. If you want to set a password for the super administrator, right-click the super Administrator Account and set the password to log out of your current user. Then you can log on to the super administrator account.
The preceding method is not supported for Windows 7 home.
Step 1: Start-> All Programs-> attachments-> right-click to run the command prompt as an administrator
Step 2: Net user administrator/active: Yes
Note: like Windows XP, Windows 7 will also create an administrator account named "Administrator" by default during installation. The difference is that in Windows XP, although the Built-in Administrator account is hidden in the control panel, which is invisible to the user list, it is enabled by default. you can log on directly using the Administrator account, but in Windows 7, for the sake of system security, the Built-in Administrator account is disabled by default.