An information processing apparatus is arranged to determine whether or not the software is installed from any one of the updater from the recording medium and the downloaded updater, in accordance with a type of the updater determined by a server based on version information of the software stored in the external recording medium and is also arranged to operate such that when the updater type includes a full updater, the software in the external recording medium is not installed but the full updater is downloaded from the server apparatus and installed, and when the updater type does not include the full updater, the software in the external recording medium is installed and a difference data is downloaded from the server and installed concurrently with it.