Today, I helped my brother installing a copy of Left 4 Dead in his notebook using Windows Vista Basic. The setup had problem accessing WinSxS (I wonder why), so I took the ownership of the folder.
Then, same permission problem encountered me on Windows 7. I usually resize my photos before uploading, so it doesn’t take too much time. I do so today, but then the files can’t be deleted.
I think deleted them through an interface (forgot), but when I check again, there’s still ghosts of those files (there, no data, unreadable owner and can’t be deleted).
Hope a restart would help.