Personal computer operation environment presetting system and method based on detecting an input AC power source voltage on the personal computer when a wireless LAN card is mounted therein

An input power source voltage detecting unit detects the input AC power source voltage on an electronic device, and a country discriminating unit discriminates the country with the electronic device present therein according to the detected voltage. An operation environment presetting unit presets the electronic device to operation environments of the country discriminated by the country discriminating unit