i had issues with ownership when i put an old drive into my win7 machine..
under the security tab where it tells you to go, there is a small little box that comes unchecked, that neds to be checked. otherwise you only "own" the file or folder you were trying to open, not the whole drive.
it took me a little while to get it all to work, but its there. look for the box. from what i remember, its next to small print. not right up front where you'd think it would be.