An information processing device, a method of saving and loading data, and an information recording medium are provided. A volatile memory means of an information processing device of this invention stores data in a volatile manner. A nonvolatile memory device stores data in a nonvolatile manner. A determination unit determines a cause of a reset which has been generated. A saving unit saves the data stored in the volatile memory device into the nonvolatile memory device when the cause of the reset is a specified cause, and operation of the information processing device is stopped by a stopping unit. A loading unit loads the data stored in the nonvolatile memory device to the volatile memory device when the cause of the reset is not a specified cause, and operation of an operating system of the information processing device is started by a starting unit. A program which implements the information processing device is recorded on an information recording medium.