Originally Posted by Tahuhali
So I found the page on Microsoft's website and it said:
"On the Enter the product key to activate Windows page, enter your product key. The product key should be in a purchase confirmation email if you bought Windows 10."
but I don't have any such email and I don't believe my friend does either. is there some application I can run from Ubuntu to see what the product key the machine has? I remember using such a program years ago but I don't recall what it was.
If you did the Win8 -> Win10 upgrade (or your friend, rather) then you don't need to enter in a product key. it should activate after install when it connects to the internet, as Win10 upgrades go off of a hardware ID that was generated during the upgrade.
With the newer ISO's of Win10, I believe you can also enter in the Win8.1 product key, from the COA sticker.