This procedure is utterly useless and unnecessary. However, it's being reposted over and over and over again.
a) everyone who has internet access while installing W8.1 (especially laptop users with enabled wifi) can enter their W8 key and it'll be accepted with no problems.
or
b) those who are in other category (desktop users etc. or simply offline) can just drop an ei.cfg in the sources folder of w8.1 installation media.
Contents of ei.cfg for w8.1 pro edition are following:
By doing this windows 8.1 won't even ask to enter a key during installation. Valid key can be entered during 30 days. Just like in Windows 7.
And if you omit EditionID from
ei.cfg, you will get an option to select edition that you would like (Professional or Core).
No vlk key, no registry mumbo jumbo, no messing with cmd, no rearm, no restart are required.
http://www.jmedved.com/2013/09/installing-windows-8-1-or-8-without-a-product-key/
http://winsupersite.com/windows-8/windows-81-tip-download-windows-81-iso-windows-8-product-key
http://skesov.ru/kak-izmenit-obraz-...zaprashivalsya-litsenzionyiy-klyuch-sistemyi/
Edit: It's well documented and known since windows 7 yet everybody ignores it. Whatevs ...