An information processing device includes a question provider that outputs questions for specifying a cause of a defect of a device or a countermeasure for the cause of the defect, a response receiver that receives responses to the questions output by the question provider, a defect cause specifier that specifies the cause of the defect of the device or the countermeasure for the cause of the defect on the basis of the responses received by the response receiver, and an operation history information receiver that receives operation history information of the device. The question provider varying the questions that are to be output, on the basis of the operation history information received by the operation history information receiver.