Enable VGA Mode
The system is started using the basic VGA driver. The basic video driver is used every time the system is booted in any of the Safe Modes. This mode is used when a newly installed graphics driver is causing Windows not to start properly. All Windows-compatible video cards support this mode.
Debugging Mode
When the system is started in debugging mode the debug information is sent to another computer through a serial cable.
Directory Service Restore Mode
This mode is used in restoring the SYSVOL directory and the Active Directory service on a domain controller. This mode is used by the server operating systems.
If the operating system is installed using Remote Installation Services then few additional options may be available that can be used to restore or recover the system using Remote Install Services.












