Marty List brings us CYT freeware, which allows you to change the default user name that is shown at the logon prompt. This is useful when you have logged onto a user's computer and don't want them to lock out your account by typing their password with your UserName.
The readme contains:
Cover Your Tracks version 2.50 A default user logon utility for Windows. Allows you to change the default user ID shown at the next logon. Use Cyt.exe /? to view the optional command-line syntax. Copyright ©1998-2000 Marty List Requires MSVBVM50.DLL version 05.00.4319 or later. To obtain the latest versions of the Microsoft Visual Basic run-time files, see the Microsoft Support Knowledge Base article Q180071: http://support.microsoft.com?kbid=180071. ================================================================== Revision History: 2.50 11/28/2000 Added code to reset the user name shown for each RAS profile on Win9x. 2.02 07/20/2000 Fixed a bug with DontDisplayLastUser on Windows 2000. 2.00 06/19/2000 Added support for Windows 2000 and Windows 9x. 1.10 05/15/1998 Added option to modify profiles and support for command-line switches. 1.00 04/09/1998 Initial release.