I would try to go back to Windows 10 as I don't see any good in trying to overcome the processor limitation.
1) If you have gone past 10 days this option may not apply.
Go to:
Start menu > Settings > Windows Update > Advanced options > Recovery > Previous version of Windows.
2) Easiest way is to download the Windows 10 installer for media tool and install on a USB key (need 8+ GB of space):
https://www.microsoft.com/en-ca/software-download/windows10
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