Hide the Name of the Last User
I've switched to the classic logon screen, but now the username of the last person who used the computer is shown. From a security standpoint, this is not an improvement!
To hide this username, you must dive into the Windows Registry. Go to Start -> Run, type regedit, and click OK. In the Registry Editor window, expand the branches on the left side to HKEY_CURRENT_USER\Software\Microsoft\Windows\NT\Cu rrentVersion\Winlogon.
(Notice that this is in the Windows NT branch, not the Windows branch).
Create a new value in this key: right-click Winlogon and select New String Value, type DontDisplayLastUserName for its name, and press Enter. Double-click the new value, type 1 in the "Value data" field, and click OK.