In tip 025, we cleared the last user name from the logon dialogue box of a Windows NT platform.
ClrName clears the last username on Windows NT, Windows 2000, Windows 95, and Windows 98.
"Clear Logon Username Version 1.3 ClrName is a small utility that clears the last user's name from the Windows 95/98/NT/2000 logon dialog box. Unlike Windows NT, which offers this functionality through a registry entry, the last user's login name is always loaded when Windows 95/98/2000 starts, representing what some might consider a minor security issue. Just add ClrName to your Startup folder, and the name is automatically cleared. ClrName has a built-in 15-second delay before the last-username Registry entry is cleared. That means if you call ClrName from your login/Logon script, it has enough time to finish execution before the Windows logon completes and the shell is loaded. You can specify any number of seconds of delay as a command-line parameter."