Downgrade from Windows 10 Pro to Home? - Microsoft Community
https://answers.microsoft.com/en-us/windows/forum/all/downgrade-from-windows-10-pro-to-home/345f5464-cb7a-44b3-8856-237cbec072c8
WEBJan 11, 2017 · Open Registry Editor(WIN + R, type regedit, hit Enter) Browse to key HKEY_Local Machine > Software > Microsoft > Windows NT > CurrentVersion. Change EditionID to Home (double click EditionID, change value, click OK). In your case it should at the moment show Pro. Change ProductName to Windows 10 Home.
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