Apparatus and method for protecting failure of computer operating system

A method and apparatus for ensuring that the computer system does not fail to boot under any circumstances includes an invisible storage region that backs up the operating system, BIOS set-ups, and registry files for booting. The invisible storage region cannot be accessed by a user or the operating system and so is not subject to damage in the event of an abnormal shutdown due to power failure. Therefore, the computer system never fails to boot due to the damage at the hard disk containing the operating system even under the abrupt interruption of power supply.