Smart Defrag is an intelligent and stable disk defragment tool designed for maximum hard drive performance. It offers efficient defragging technology like multi-threading defragging and large files defragging to hard drives and SSD. Boot Time Disk Defrag allows you to customize defrag specified files in system boost time. After that, you can enjoy faster PC startup and top running speed with the most stability. Smart Defrag 5 not only provides disk defragmentation as any other tool does, but also optimizes it by intelligently streamlining your files based on using frequency.