You definitely can’t install Edge on a Windows 7 machine, but you can still run it using virtual machines.
Can you install Microsoft Edge on Windows 7, another Windows operating system, or even on non-Windows operating systems? The short answer to that question is no, you cannot. But you do have options when it comes to running Microsoft Edge on devices that are not running Windows 10. Microsoft itself notes that Microsoft Edge is only available on Windows 10. Edge is the default system browser on Windows 10 devices. It replaced Internet Explorer (which is also still available), and can best be described as a fast but basic web browser.