Patent ID: 7814306

Claim:
A computer, comprising: a processor; an input device; a storage medium storing a basic input/output system (BIOS); a hard disk drive (HDD) comprising a hard disk, the hard disk comprising a first partition, a second partition, and a boot block storage section, the first partition storing an operating system (OS) to be executed by the processor, the second partition storing data for use in restoring the OS to a predetermined state for system recovery, and storing restoration software to execute processing to restore the OS to the predetermined state for system recovery by using the data, and the boot block storage section storing a boot block having partition information indicating which one of the first partition and the second partition is an active partition; and the BIOS performing control to change the partition information of the boot block to indicate that the second partition is the active partition and to activate the restoration software stored in the second partition based on the partition information, upon depression of a specific key of the input device.