To disable the Other Users tile

1. Click Start and in the Run box, type gpedit.msc then press Enter. This opens the Local Group Policy Editor with the top-level Local Group Policy object open for editing.
2. In the editor, expand Local Computer Policy > Computer Configuration > Administrative Templates > System > Logon. 
3. Double-click Always Use Classic Logon.
4. Select Enabled, and then click OK. 
5. In the editor, expand Local Computer Policy > Computer Configuration > Windows Settings > Security Settings > Local Policies > Security Options. 
6. Double-click Interactive logon: Do not display last username. 
7. Select Disable, and then click OK. 
8. Restart the machine or open a command prompt as administrator and run the command gpupdate /force.

To enable the Other Users tile

1. Invert the two policies above.
2. Restart the machine or open a command prompt as administrator and run the command gpupdate /force.

1. Click Start, type regedit.
2. Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System.
3. Double-click on dontdisplaylastusername in the right pane and then modify the value to 1.
4. Alternatively, copy the text below into a text editor, save it with the extension .reg and execute it.  A sample file is attached to this article.

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System]
“dontdisplaylastusername”=dword:00000001