理論上美國那個也應該叫升級版，問題是盒子上完全沒有寫Upgrade...
而且安裝過程也不會檢查上代OS或上代序號, so...
呃...Best Buy的網頁上產品名稱改了...現在變成Windows 8 Professional Upgrade
http://www.bestbuy.com/site/Windows...83#BVRRWidgetID
另外留言區有些不滿的聲音：
Trickery Advertising on Microsoft
What's great about it: Price
What's not so great: This product is an upgrade!
Nowhere on this product packaging does it indicate that this IS an upgrade and not a full retail version. I found out after installing a clean install using Parallels on my MBP and the product wouldn't activate. Called Microsoft support to active this produ...