Disk fragmentation is generally main cause of slow and unstable computer performance. Smart Defrag helps defragment your hard drive most efficiently. Smart Defrag not only defragments computer deeply but optimizes disk performance. With "Install it and forget it" feature, Smart Defrag works automatically and quietly in the background on your PC, keeping your hard disk running at its speediest. Slow down, freeze-ups and crashes will be a thing of the past. Features include: Easy 2 Use Install it and forget it. The intuitive interface makes Smart Defrag the ideal utility for complete dummies. Always-on Working Smart Defrag works automatically and quietly in the background, constantly keeps your computer fragment-free. Super Efficient Defragmentation No more long time waiting, Smart Defrag has the fastest defragment engine in the world and finishes the job just in minuts. Optimize File System Not just simple defragment, Smart Defrag also streamlines the file system and makes your computer run at the top speed. Free and Free Smart Defrag is 100% freeware. You can get it and update it without any penny.