Why go to that trouble, when the install will not activate anyway.
I am sure you could get a copy of win7 or win8.1 cheaper than Win10. (eBay or amazon etc)
Then you can do a minimal install and get the 'Free' upgrade.
I am sure it would be cheaper than paying for a Win10 copy on disk with Serial or whatever they supply now.
(Beware of dodgy s/w being sold including recovery disks being sold as cheap Win7 or Win8 disks, which will not work on anything other than the original hardware.)