rollback

Hi everyone, I decided to wind back my install of windows 10 to my previous version, windows 7 after getting fed up with the start/cortana problem and having to reboot all of the time with f8. However, when it finally finished the boot menu came up with Windows 7 Windows 7 (recovered) Now...

I got the previews and was doing fine until I got a preview which broke my sound so I naturally rolled back, however when I did, my start menu was empty and I can't add anything I tried changing the settings and can bring back the stuff like recent apps but I can't bring back options that...