Sorry if this is silly but, doesn't emptying the recycle bin get rid of all the excess files? I've got the same thing on my HD. But in my C drive, i've got 2 folders and in my D drive i've got three(???). My guess is that when you delete something windows renames the file so that it can be indexed for recycle bin easily and puts it in the recycler. I've got one extra folder on my C drive, NPROTECT. That's probably because of Norton Antivirus and Norton protected files.