That method has NEVER worked and I don't see it on any web site. Nice for you to confirm again it does not work.
The methods I am using are those you find on the web. I think you can find those so I'll stop here.
I have Windows 10 home installed on a KVM through GNOME Boxes. In the Windows installer, it asked me for the license key, and I put in one from Windows 7 home premium. It's the same license key that came with my device and worked on Windows 7 before I switched to Linux.
When I put in the license key, Windows 10 took it like it was a valid license key, Just like Windows 7 did when I activated that.
I thought it was activated, but the settings home cares to differ? Activation settings knows it's got a license key for Windows, but it's not activating. I can't get an error code, either. When contacting Microsoft support, they told me to activate by phone by running SLUI 4. That did nothing...
I'm ok with using Windows unactivated for now, and the only reason I'm even using Windows is that Office 365 won't work over WINE (And I need 0365).
Any suggestions as to what I should do?