According to one embodiment, when an external device is connected, the electronic device detects devices in the external device, and setup of detected devices. When the electronic device is powered, when a power state is restored from a hibernation or a sleep state to a normal state, or when the external device is connected, it is determined whether a first device is included in the detected devices. When the first device is included and when setup of a second device is failed, detection of devices and setup of detected devices are repeated.