Vista - Can't Disable File Sharing

Vista 5600 - I get the dialog box "...Folder is Shared...", etc. when trying
to delete or when a temp file is deleted. When I go to "Sharing", it tells
me I can't "unshare" the folder because it is in a shared folder. When I go
to the folder's mother folder, it tells me it isn't shared! I am tired of the
system deleting temp files and having to confirm each time. I can't be
productive! If the mother folder isn't shared but the daughter folder is, how
do I stop this!!?
Thanks - Tony

I have one additional item I just discovered - it says I am sharing it with
"Unknown Contact". Who the heck is that!!? I only have 2 contacts in there
right now; me and my wife and I only have 1 user set up.