If you think you don't know what the Metro screen is; it's the purple screen with the big square tiles that you get by default when you click Start in Windows 8 or Windows 10. Yeah, that screen.
It's the touchscreen interface that Windows gives you whether you want it or not. Even if you don't have a touchscreen! If you go to All Apps, it doesn't show you all the apps. And when you search for the program you want, half the time you won't find it.
But you can get your old Start Menu back with Classic Shell. You can go to http://www.classicshell.net/downloads or just google "classic shell".
It installs easily and works just like the Windows 7 Start Menu.