An image processing apparatus includes an image processing unit configured to process an image; an input unit configured to input a start-up instruction to the image processing unit; a detection unit configured to detect that a first electric power is supplied in a case where a supply cable is connected to an electrical outlet in a state of separation of the cable from the outlet; a first non-volatile storage unit and a second volatile storage unit configured to store first and second values, respectively, the first and second values indicating whether being in a valid state for receiving the start-up instruction; a determination unit configured to determine whether the first value indicates the valid state and is different from the second value; and a control unit configured to restrict a second electric power supplied to the image processing unit, and to bring the image processing apparatus into the valid state.