I haven’t tried this but:
To access this, open the Start menu and select Settings. Click the “Update & security” icon and select “Recovery.” You should see a “Go back to Windows 7” or “Go back to Windows 8.1” option. Click the Get started button to get rid of your Windows 10 install and restore your previous Windows install.
How to Uninstall Windows 10 and Downgrade to Windows 7 or 8.1
http://www.howtogeek.com/220723/how-to-uninstall-windows-10-and-downgrade-to-windows-7-or-8.1/
My computer was changed to Windows 10 when I went on line yesterday against my will. Thanks for the info to recover Windows 7, I did it earlier and it was easy and took about 15 minutes, now I’m back on 7, at least for the time being. I also changed the setting on “downloads and updates” to show me before automatically doing them.
BFLR - thanks for the info!