I changed everything in file system, my main HDD so that i could change everything with the normal user, Because i didn't want to have t log into root to do it.
i bet you will never do that again !
i take it you did this ( guessing)
chown -R ( user name):( user name) /
chmod -R 777 /
there may be no easy way to revert them back .
Most will be 755 , some are 644 , and some are not owned by root but apache or clamav , ...
the essayist way to fix is to reinstall