Boot control device, boot system, and boot control method

This boot control device (110) manages multiple instances of the same boot program (121) which are stored in a nonvolatile memory (120) and are for starting a system. The boot control device (110) is equipped with a copy unit (131) which, when the number of normal boot programs (121) stored in the nonvolatile memory (120) falls below a predetermined threshold value of two or more, copies the normal boot program (121) to another region of the nonvolatile memory (120).