you may use registry editor to configure user accounts dysplayed on the
Welcome-screen:
Start the Registry Editor
Go to HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ Windows NT \ CurrentVersion \
Winlogon \ SpecialAccounts \ UserList \
Right-click an empty space in the right panel and select New > DWORD Value
Name the new value Administrator
Double-click this new value, and enter 1 as its Value data
Close the registry editor.