If you really like Windows 7, it's out of support so you can just upgrade to Windows 10 then transform it to Windows 7. It's gonna give you the Windows 7 like experience and keep yourself up to date with the latest improvements and security patches. This is gonna be a better choice without just staying to Windows 7 and be so vulunerable because support ended on January 14, 2020 and the EOSNotify.exe file in System32 was I think created on December and the EOSNotify.exe file is a startup process at 12:00 and it displays a fullscreen message about Windows 7 EOL. This file was created to prepare the OS for EOS. You can upgrade Windows 7 to 10 on the Media creation tool page by downloading the MediaCreationTool.exe file from Microsoft to upgrade to Windows 10.