Guide to downgrade Windows 10 Professional To Home:
1. Open regedit.exe and navigate to HKLM\Software\Microsoft\Windows NT\CurrentVersion2. Change ProductName to Windows 10 Home
3. Change EditionID to Core
4. Navigate now to HKLM\Software\Wow6432Node\Microsoft\Windows NT\CurrentVersion
5. Change ProductName to Windows 10 Home
6. Change EditionID to Core
7. Close regedit.exe (no need to restart)
8. Run the Windows Media Creation tool and proceed with the installation.