Vistaだそうです。
ITmedia PCUPdate:Longhorn正式名称は「Windows Vista」に
amzn_assoc_ad_type ="responsive_search_widget"; amzn_assoc_tracking_id ="amazon-web-22"; amzn_assoc_marketplace ="amazon"; amzn_assoc_region ="JP"; amzn_assoc_placement =""; amzn_assoc_search_type = "search_widget";amzn_assoc_width ="720"; amzn_assoc_height ="360"; amzn_assoc_default_search_category =""; amzn_assoc_default_search_key ="写真集";amzn_assoc_theme ="light"; amzn_assoc_bg_color ="FFFFFF";
楽天