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 product over the phone, was informed that you cannot active this product unless it is installed over a Windows 7 installation.
I'm p*ssed; I expected a full retail version when I placed this order.

Best Buy Lied
What's great about it: Inexpensive way to upgrade Vista/XP machines
What's not so great: Not the Full version
I was informed this was a full version. There was nothing about this product description that indicated that it was an upgrade and therefore I will not be keeping it.
On a side note, I have been using Win 8 RP for sometime. While there are some hardware issues, a lot can be worked through though. If you get a SSD drive for your primary drive and use this OS you will be amazed by the speed this OS operates at. Windows 8 gets closer to OS X in that it can run many more programs without crashing the system. I ran Win 8 RP on my test bed AMD 9500 and I could open nearly every program at one time without issues. Try that in Vista and you'll be unplugging it just to get it to work again. When Best Buy begins offering the System Builder Version I would suggest it as it will greatly enhance your experience.