YSK When you delete a file, even if you empty the recycle bin, that file stays in your hard drive wasting free-space.

Files, Folders and everything we "right-click" and delete in our PC doesn't physically disappear... It stays in our hard-drive and can be easily restored and recovered with the proper software. Now, in order to get rid of this files and release some space... we must delete the"free-space" in our hard-drives wich is the place in where this garbage roams... Doing it manually can be time consuming and a pain in the a$$... That is why exist quite a few pieces of software that do this more fast and easy, even some antivirus programs come with this feature, so you just need the right tool and all those "ghost files" will be gone.