What’s the primary cause of slow/unstable PC performance? It’s disk fragmentation. Smart Defrag helps defragment your hard drives more efficiently than any other product on the market –– free or not. Smart Defrag is 100% freeware. Download, use, and update it absolutely free for your personal computers, business or enterprise PCs –– it won’t cost you a penny.

Designed for Windows Vista, XP, 2000. and Windows 7

Download: IObit SmartDefrag 1.40
Homepage: IObit.com