Deleted win-7 files

Hello James. It is to keep you inform that AVG PC Tune up will not remove the files. I kindly request you to reinstall your Windows 7 OS using your setup file. Thank you.

I updated from WIN-7 to WIN-10.  I wanted to return to WIN-7 but the files necessary have been removed.  I didn't remove any files.  I can only assume that AVG "PC Tune-UP" removed them.  Is there a way to recover those files so I can return to WIN-7?

Hello James. It is to keep you inform that AVG PC Tune up will not remove the files. I kindly request you to reinstall your Windows 7 OS using your setup file. Thank you.