You would have to do a "change product code" and switch to 10 Home to do the slmgr /ato and activate 10 Home. I've had similar activation issues happen when doing the "change product code". The other option is to go to the activation screen in settings and then clicking on the "activation troubleshooter". That's worked for me at least once. That option is only there if activation fails though.
Settings > Update & security > Activation.
When trying to switch back to Home edition the key I enter in the change product code doesn't work ("The product key that you entered didn't work. Check the product key and try again, or enter a different one. (0xc004f050)). The key I am entering was provided earlier on in the post (TX9XD-98N7V-6WMQ6-BX7FG-H8Q99).
When I troubleshoot it says "We can't activate your copy of Windows. Make sure you have an internet connection..."
If I can get back to W10 Home then I should be able to activate it, maybe it's not working now because I am on a different W10 edition than what I should be?
Ok, I've gone from Pro to Education and back to Pro via change product key. I've gone from Home to Pro with a change key too, can't remember if I've ever tried to go back to Home from Pro though. I'll try it latter on though on my spare desktop PC. We just painted the room it was in so its all unplugged at the moment. Once the paint dries a bit I'll hook it all up and see if it will let me go to Home with key change and get back to you. I don't want to mess with my main PC. I have a couple of downloads on the go at the moment.
Ok, my spare desktop is running 10 Education. I get the same "The product key that you entered didn't work" if I enter the generic Pro or Home key. This may be because I installed with my MSDN Education ISO, and not the Media creation tool ISO though? I though I had used the MCT ISO, but it may have been my MSDN ISO. I've been trouble shooting an issue I have with the Education version. Mulling over what my next steps are, and haven't decided what I'm going to do at the moment.
Bit the bullet and tried the Home key on this PC running 10 Pro, got that same "The product key that you entered didn't work" I guess you can't go from Pro to Home. I know for a fact I have gone from Pro to Education, and back, in the past with an earlier build. Looks like you'll have to clean install 10 Home to get back to Home. Backup what you don't want to lose first. When asked for a product code just click "I don't have one" and select Home from the menu when it comes up. You could just enter the Home key, but skipping it is easier IMHO.
Did you do @Kari's registry changes first? He seems to think it should be possible.
How do I change from windows 10 pro to windows 10 home?
I did do that but i'm not entirely sure on how to do step 7. ("Insert the Windows 10 Home install media, do an in-place upgrade by launching the setup from desktop (not booting with Windows install media)")
For this I downloaded the Windows 10 ISO and reinstalled my Windows only keeping my personal files (It didn't allow me to keep my personal files AND apps). But by doing this I had the files 'Windows.old' and my new Windows file.
No, just tried entering the key as I've done in the past. I've seen that reg hack before, Windows 8 I think and it works. I did it at least once in Windows 8 years ago. Don't really want to try it on this PC though. If my spare was running Pro I'd give it a go, its currently running Education though.
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