An apparatus and method for managing a memory of a computer and controlling a booting operation of the computer, are provided. The computer includes a memory having a user area and a protected security area (PSA). The user area has a management area. The method includes assigning a first partition to the user area of the memory; storing first partition information in the management area of the user area, the first partition information pertaining to the first partition; assigning a second partition to the PSA in response to an access signal, the access signal authorizing access to the PSA; storing, in the management area, second partition information pertaining to the second partition; storing the second partition information in the PSA; and removing the second partition information from the management area after storing the second partition information in the PSA.