JSI Tip 6128. Overview of Logon, Logoff, Startup, and Shutdown scripts in Windows 2000.

Microsoft Knowledge Base Article 198642 contains the following summary:

This article describes the scripts that are available in Windows 2000. It provides an overview of the logon scripts that you can assign to individual users in Computer Management and the user logon, user logoff, computer startup, and computer shutdown scripts that you can configure by using Group Policy.