So that the logon user name is not displayed when the Windows operating system is started.

To prevent the logon user name from being displayed when Windows 2000 is started, click Start> set> Control Panel to open the control panel window, double-click "Administrative Tools> Local Security Policy" to open the local security settings window, and expand "Local Policies> Security Options" on the left ", on the right side, find and double-click "do not display the user name of the last logon on the logon screen". In the pop-up Local Security Policy settings window, select "enabled" to exit. In this way, the user name will no longer be displayed at startup.

Alternatively, go to the Registry Editor and find HKEY_LOCAL_MACHINE/software/Microsoft/Windows/
CurrentVersion/policies/system: set the value of DontDisplayLastUsername to 1.