So, I'm having big trouble trying to fix my friend's computer. She stopped a Window's update shutting down the computer (I know, it hurts just to read).
Now the PC is not booting. I tried everything to fix Windows, but not succeeding. So I copied the two partitions (Data & OS) onto another hard disk, so I have a copy of everything. I wiped down the hard drive and clean installed a copy of Windows 10, using the ISO downloaded from the Microsoft official site.
And here the problem arrives: there isn't any sticker with Window's activation key on. And the key is not anywhere else.
So I'll have to bring it out from the backup. And here I'm needing help: where do I find this key? It is even findable or is encrypted and not decryptable?