The document discusses the Ghost computer backup and restore concept using Symantec Norton Ghost software. It describes embedding Ghost into the computer boot menu using an HBG.EXE file to allow backing up the hard drive to another partition or drive. This creates a backup file that can then be used to restore the computer if needed by overwriting the original drive, recovering the system to its prior state without reinstalling Windows or other software. The process involves making an initial backup when the system is working properly, then using the backup file for restoration if issues later arise preventing Windows from booting.