Disk Defrag windows 7 Pro's interface is intuitive, featuring the classic cluster map that displays fragmented, defragmented, and empty space. Disk Defrag Pro took one minute to run a scan of our hard drive and determine how much it was fragmented. Disk Defrag Pro is a disk defrag tool designed for maximum hard drive performance. Based on latest "Boot Time Disk Defrag" technology, this disk defrag program is created with the world's best defragmentation ability.