IObit Smart Defrag 6 is a reliable and easy-to-use disk optimizer designed for peak hard drive performance. The latest stable version can be found here.
Unlike other traditional disk defragmenters which only provide defragmentation, Smart Defrag 6 also intelligently streamlines your files based on using frequency to accelerate disk data access. It’s become almost common knowledge that the included Windows disk defragmenter is not the best and never has been. This shortcoming is where IObit Smart Defrag comes into its own; you can simply set it as your Windows defragmenter replacement and forget about it. You have many options to choose from including boot time defrag which can defrag the Windows registry to release more RAM and ensure system stability and you can also customize Boot Time Defrag as per your needs.