KC Softwares KCleaner 3.5

It's an effective and handy Hard Disk cleaner that tracks every useless byte in order to give you all the resources you may need for your documents, music, pictures, movies, etc.
It is the first product of this kind featuring a fully automatic mode, which works in the background so that you don't have to care about when to launch it.

As a proof of its efficiency, it often finds up to many Gb not even seen by its competitors. And if data security is something you are interested in, you'll love the secured file deletion methods proposed by KCleaner, making deleted files unrecoverable by any known mean.