An information processing device communicable with an external device has a device driver installed therein to control the external device, an application installed therein, and a controller executing the device driver and the application in parallel. The device driver, when executed, causes the controller to acquire from the external device a status code corresponding to a status of the external device, show on a display device a display representing the status of the external device, based on the status code, determine whether the application is executable, execute the application when determining that the application is executable, and transmit the acquired status code to the application in execution. The application, when executed, causes the controller to receive the status code from the transmitter, and show on the display device guidance information containing more detailed information than the display based on the status code.