IMAGE FORMING APPARATUS THAT PERFORMS UPDATE OF FIRMWARE, AND CONTROL METHOD THEREFOR

An image forming apparatus which is capable of properly updating firmware. Update firmware is downloaded into a download area of an HDD and expanded and stored in a temporary expansion area of the HDD. A CPU determines whether or not the update firmware expanded and stored in the temporary expansion area has been tampered with. The update firmware stored in the temporary storage area is applied to the image forming apparatus when the CPU determines that the update firmware has not been tampered with.