Windows Vista 旗艦版

All of about you ONLY have ONE lic. That mean when one of the computer install and register, no one can register again... If you want to have install more that one, either you buy OEM version隨機版 (cheaper but still one licence) or but Site licence, But the site lic. at least many many lic for every ONE purchase (5~10 lic for each purchase)

Good Luck!!