Later I tried to uninstall Active Directory by using same command "dcpromo",,,during uninstallation it asked about password,,,,when I entered to use "forum", it complained about complexity for the password,,,,then I entered different password: Forum06,,,,it accepted that one as new password.
When I rebooted the PC, I could not access my old username account which was Administrator….the new username account that has bee created , called also Administrator.
1- Does the new username account that has been created overwrite the old username account (Though still I can see the two different folders name Administrator (for old account) and Administrator.Dell (for new account) ) ?
2- How can I access my old username account (Administrator) ? Because it will hassle to copy every (profile) thing from old account (Administrator ) to new account (Administrator. Dell) ?