An information processing apparatus provided with a first information processing unit and a second information processing unit, wherein the first information processing unit infected by a virus is cleared and normal communication restored quickly without human operation. The virus infection is quickly detected by an external virus management function device through a first communication system, a communication suspension instruction is transferred through a different second communication system having a high security level to the first information processing unit, and communication by the first communication system is disconnected. Further, anti-virus solution information is transferred to the first processing unit through the second communication system, and virus removal in the first processing unit is carried out. Further, after removal, the disconnected communication is restarted.