If you are fond of keeping your hard disk clean and organized, you can find and remove duplicate files with Duplicate Cleaner, search and delete duplicate or similar images with VisiPics, and erase empty folders with the following free utilities:
1, EFN( Empty Folder Nuker )
EFN is a portable and lightweight program that can search and remove empty folders to the Recycle Bin, you can make it integrated with Windows Explorer.
2, RED( Remove Empty Directories )
RED is a freeware created to delete all empty directories recursively under a root folder. It can treat directories as zero size ones if they only contain empty files, .tmp files, thumbs.db and desktop.ini files.
RED supports most common 32-bit and 64-bit Windows OSes.
RED is a 395KB download available from SourceForge.net, it requires Microsoft .NET Framework 3.5 or later.