Removing duplicate files and downloads from system

Hi All,

I'd like to know the best software I can use to remove duplicate files on my system. Many a time I download zip files and other compressed formats and torrents and also the ones that I purchase online. I have not been cleaning my system but I have been using Ccleaner.

You can find that I have a folder in c:\downloads named cleaner and again in D:\ with the same software. :(

Duplicate file removing softwares often make a mess if not used cautiously.

of what I have used,

TuneUp Utilities, Windows 7 Manager, Raxco PerfectSpeed, etc.