Abstract: A mobile device comprises an e-mail receiver for receiving an e-mail indicating that a pattern file for virus disinfection can be updated; an e-mail determination unit for determining model information described in the e-mail received by the e-mail receiver; and a file updater for acquiring a pattern file corresponding to the model information, when the e-mail determination unit determines that the model information related to the mobile device is described.

Abstract: To provide a mobile terminal apparatus with the lower communication cost in sending a log at the occurrence of a malfunction, abnormality or fault in the mobile terminal apparatus to a network. A diagnostic process for the malfunction is performed in accordance with a diagnostic policy acquired from the outside. An error code corresponding to the diagnostic result is generated. The generated error code is outputted. With an automatic fault diagnostic function of automatically analyzing the fault in the mobile terminal apparatus without directly sending the log collected in the mobile terminal apparatus to an analytic server, the communication cost can be reduced.

Abstract: A download system capable of appropriately spreading loads on a server and on a transmission path, and further enhancing convenience in download of data. A reservation candidate acquirer of a communication terminal acquires from a software managing server reservation candidate information containing time information about time zones as candidates to which a reservation for download of an update file can be allocated. At the communication terminal a user selects a reserved time zone from the time zones corresponding to the time information included in the reservation candidate information, and the software managing server registers the reservation in the reserved time zone. Thereby, the reserved time zone can be selected from the candidate time zones transmitted by the software managing server and the candidate time zones are determined based on a reservation table set so as to spread loads on the software managing server and on the transmission path.