I wanted to install Win 10 Pro on top of a Chinese version of Win 10 Home. When I ran the installer, it asked me what language, but not what version, and I ended up with a new Win 10 Home. So then I went in to upgrade by changing the key I had received from youse guys. The key was accepted, however right after that I got an error code which seemed to indicate that the key had NOT been accepted. I tried re-entering the new Win 10 Pro key code, but I kept getting an error saying that the key was not accepted. At that point, I was about to contact you, but I decided that before that I should reboot and try again. And voilà, after the reboot I saw that Win 10 Pro had in fact been successfully activated. Mission accomplished.
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