The other day I tried to open a folder, but it said that it was not asscessable & that it may be corrupt or unreadable... So I tried to delete it but it came up with an error message error 0x80070091: The directory is not empty
I tried to delete it in safe mode a few times...but no luck....it came up with the same message

Give LockHunter a try, it may be able to delete the folder by scheduling it to be deleted on the next boot.