I didn't think you needed a key for Windows 10? I thought the upgrade was free from older operating systems?
It was a free upgrade on my pc with Windows 7.
And yes this should be in digital goods

:
https://bitcointalk.org/index.php?board=93.0That's exactly what I was thinking. If you can upgrade to Win10 with your Windows 8.1 key, then why buy a key for Win10 in the first place?