Windows 7 RDP how to hide remotely logged on users

• Once you are logged into one of these editions of Windows 7, type "secpol.msc" into the start menu's search field and click on the first result, or type it into the Run dialog and hit Enter.
  
• This launches the "Local Security Policy" editor / snap-in; double-click on "Local Policies" to expand it, and select "Security Options". Then, scroll down until you find the entry labeled "Interactive logon: Do not display last user name", and double-click on it.
  
  This is a simple dialog which offers only two settings, "Disabled" being checked by default. Select "Enabled", and click on the "OK" button to apply the new setting (takes effect immediately).
  
• You can now test how the modified Windows 7 logon screen looks: hold down the Windows logo key and press "L" (as in Lock). Then, click on the "Switch user" button to see all other users, and all you'll see are two blank text fields for username and password, respectively.

Hide usernames on logon screen using the registry

If you have Windows 7 Home Premium / Basic or Windows 7 starter, here's how to enable the same setting using the registry. Type "regedit" in the start menu's search field, and click on the first result. Once the registry editor has opened, go to the following node (double-click on each to expand it).

HKEY_LOCAL_MACHINE > SOFTWARE > Microsoft > Windows > CurrentVersion > Policies > System
Edit the "DontDisplayLastUserName" DWORD (create it if needed), and change its value to "1" to enable the feature, or "0" to disable it. The new setting also takes effect right away.