Maybe there is a permissions thing that is preventing you from seeing it? Try this - download
SetACL Studio (which has a 30 day free trial) and navigate to the folder and see exactly what's there. This is useful software - it builds its display "from the dark side" :P meaning that it doesn't ask for Windows's interpretation of what's on disk. You can see what is there even if you don't have rights to it. (The command line version is free and scriptable, but it's easier to use the GUI.)
Assuming something there is honked, change the owner and hit save, then change permissions and hit save, then see what you can do.