An image forming apparatus is disclosed that includes multiple application modules configured to perform image processing including scanning, printing, and copying of an image; multiple service modules configured to perform an image forming operation and to control the image forming apparatus; a nonvolatile configuration information storage part configured to contain first configuration information of the application modules and the service modules; a configuration information comparison part configured to read second configuration information of the application modules and the service modules and compare the first configuration information and the second configuration information before starting the application modules and the service modules; and a notification part configured to notify the manager of the image forming apparatus of the difference between the first configuration information and the second configuration information in response to detection of the difference.