Abstract: A failure factor extracting element of a server computer extracts particulars of failure and factors accountable for the failure from a client failed execution environment information database; a client identifying element identifies from a client configuration information database a client computer(s) that may repeat the extract failure factor; a failure prediction information transmitting element transmits to the identified client(s) failure prediction information; a failure prediction information receiving element of the client receives failure prediction information from the server; a failure prediction information storing element stores the failure prediction information into a database; a failure factor checking element checks whether the execution environment of the currently operating client to which it belongs involves any failure factor stored in the failure prediction information database; and a notifying element supplies failure prediction information to an output unit if the failure factor checki