A management section 122 allows a user A to sign in to a server. A user data acquiring section 136 acquires, from the server, data regarding a user B who is associated with the user A in the server but who is not yet registered in an information processing device 10. A user data holding section 138 holds data regarding the user A and the data regarding the user B that has been acquired. A login screen generation section 124 uses data held by the user data holding section 138 and displays a login screen including information regarding the user A and information regarding the user B.