How Restore “TrustedInstaller” as Default Owner of a File

I took ownership of C:/ as an administrator. I was not suppose to. I tried following the step given but cannot do some of the steps because I don't have it. *How do I give permissions back to TrustedInstaller, when I changed ownership, I don't have TrustedInstaller in the list of possible owners anymore in C drive My Windows 8 don't have some the steps mentioned The following are the...