Toolwiz Smart Defrag is faster by ten times than native defrag of Windows. It can analyse the discontinuous files in the disk within several seconds(the reason for it being faster is it makes use of the undocumented NTFS parsing algorithm by Microsoft and analyses directly without using the file system). Then it quickly puts these discontinuous files in the continuous space in the disk.

Toolwiz Smart Defrag is very simple, and completely free, after installing, you can even extract exe to be used as the Green version.