I purchased Norton Utilities mostly for the duplicate file finder and a few other Windows based utilities. How does the duplicate file finder work with regard to determining duplicate files (i.e. ultimately compare a checksum - md5, sha1, etc. between files)? Or does it only compare file size, name, and date? Does it work similarly to fdupes in Linux (sort by size, compare names, sort, compare size, sort, compare hash, etc.)? Is there some Norton documentation someone could provide?