有關置底的這個問題
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Q5: 我在7月29日之前如果沒有預約升級，7月29號之後怎麼辦？
A5: 微軟客服表示目前相關升級資訊以官方網頁說明為主，所以沒有相關訊息可以先
為我做說明....
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我閒閒沒事去看英文FAQ
http://www.microsoft.com/en-us/windows/windows-10-faq
有這一段
Can I get my free Windows 10 upgrade even if I didn’t reserve?
Yes. The easiest way to get the free upgrade is to reserve, but you can
upgrade even if you don’t reserve.
Once Windows 10 is available, we’ll begin notifying devices that their free
upgrade is available. Just open the Get Windows 10 app to schedule your
upgrade. Note: Some notifications will go out as soon as Windows 10 is
available; others may go out in the weeks or months following.
有人有興趣翻嗎?
此外我不能保證如果你沒事先預約發生的任何損失喔!