Adding administrator account on Welcome Screen.
Step 1: Go to start –> Run –> enter “regedit”
Step 2: Go to “HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\SpecialAccounts\UserList”
Step 3: Add REG_DWORD name “Adminstrator”, value is “1”
Step 4: Reboot or Logoff
After that you will see the original Administrator account on Welcome Screen
Reference:
