Method One: Enable the system Administrator account from system administration.
1, open the Start menu, right click on "Computer", select "Management." When you open the entry, click "Yes"
2. In the Computer Management window, navigate to Local Users and Groups-> users. Click to expand the users item.
3. In the Details window on the right, right-click "Administrator" and select "Properties".
4. In the default state, the "account Disabled" item in the Administrator Properties window is checked. We need to cancel the check and press OK to save the changes
Method Two: Use the command to enable the sysadmin administrator account.
1. Click the Start button and type cmd.exe in the Start search box. When the corresponding program pops up, right-click and select "Run as Administrator". After entering, click "Yes"
2, when the command window is open, type net user Administrator/active:yes. After the loss, click Enter. Seeing the "command completed successfully" message indicates that the system administrator account has been enabled for illustration.