CloneMaster will clean your hard drive of duplicate files that are just wasting space. It searches for TRUE duplicate files (byte for byte), same-name files and zero-length files and bring them to your attention. It include Smart Delete, Rename, Save as. and other functions. The Smart Delete is a filter for flagging files for deletion. CloneMaster identifies duplicates based on name, byte size, data, and so on. Also there is a security feature that you can enable to leave your windows directory alone. That is, CloneMaster will not process any files and subdirectories within your Windows folder. You can also Deselect all files too.