Who should be owner to different folders in C:\ Vista?

[weraq]

I happened changed owner to my C:\ to Administrator, and I'm trying to change it back to how it normally should be, without reinstall my pc.
Can someone help to check on a normal Vista PC which fold sould be owned by Trustedinstaller and which should be SYSTEM? and is there any fold should be owned by Administraor?
OS: Vista Home Premium

 

[voyagerfan99]

Do a system restore. (Start>All Programs>Accessories>System Tools>System Restore)

 

[weraq]

Thanks for help.
Sadly the system restore just won't complet. Before it restart, the screen was showing restore register, and when I check files none of them and changed back to SYSTEM or TRUSTEDINSTALLER.
And after several try the point before the change had disapperad.