MyDefrag is a disk defragmenter and optimizer (a maintenance utility to make your harddisk faster) for Windows 2000, 2003, XP, Vista, 2008, and for X64. It is freeware, no time limit, fully functional, no advertisements. Fast, low overhead, with many optimization strategies, can handle floppies, USB disks, memory sticks, and anything else that looks like a disk to Windows.
Included are a set of easy to use scripts for endusers, a scripting engine for demanding users, a screensaver, and a combined Windows plus commandline version that can be scheduled by the Windows task scheduler or for use from administrator scripts.
MyDefrag is extremely easy to use. All you have to do is choose one of the items in the Windows start menu, for example "Fast Optimize", and MyDefrag will run and optimize all the disks on your computer. It's completely automatic. Advanced users can build their own scripts and customize just about every aspect of MyDefrag, but the rest if us only need a single click. And some patience, because optimizing your disks can take a long time.
MyDefrag - 64bit software