Safe Mode:Loads only the basic devices and drivers that are required to start the computer, including the mouse, keyboard, mass storage devices, base video, and the standard, default set of system services. This option also creates a log file.
Safe Mode with Networking :Loads only the basic devices and drivers that are required to start the computer and enable networking. This option also creates a log file.
Safe Mode with Command Prompt:Loads safe mode options but starts a command prompt instead of the graphical user interface. This option also creates a log file.
Enable Boot Logging: Creates a log file that references all of the drivers and services that the system loads (or does not load). This log file is called Ntbtlog.txt and is located in the systemroot folder (the folder that contains the Windows 2000 system files).
Enable VGA Mode: Loads the basic VGA driver. This mode is useful if a video driver is preventing Windows 2000 from starting properly.
Last Known Good Configuration: Uses the last known good configuration information in the registry to start the computer.
Directory Services Restore Mode: Allows restoration and maintenance of Active Directory and restoration of the Sysvol folder on domain controllers.
Debugging Mode: Sends debugging information to another computer through a serial cable.