The latest version of O&O Defrag, O&O Defrag 12 Professional Edition is a superior defragmentation software that optimizes your hard disk and efficiently, securely repacks file fragments back together, aiming to unleash your computer’s hidden performance through optimum defragmentation.

Main features of O&O Defrag 12 Professional:

  • Zone filing for optimal organization of files
  • 3 additional defragmentation methods (8 methods in all)
  • Improved performance at eliminating high levels of fragmentation
  • Background monitoring to ensure your system is constantly kept at its peak
  • Screen Saver Mode optimizes your PC whenever it’s not being used
  • O&O OneClickDefrag for fully automatic configuration
  • Job Assistant for scheduling defragmentation
  • Fully compatible with Windows 7,Vista and XP

O&O Defrag 12 Professional normally costs about $50 for a single computer license. As part of O&O Software promotion, users are entitled to get a free copy of earlier and older version of O&O Defrag 10 Professional Edition. The main different with latest version is that O&O Defrag 10 Pro Edition offers just 5 defragmentation methods (including Stealth and Space methods).

Follow these steps to grab O&O Defrag 10 Professional for free!

  1. Visit promotion page at
  2. Complete the registration form and you will be receiving a free license serial key by email.

  3. Download O&O Defrag 10 Professional Edition from

  4. After installed, insert your received registration license serial number, name and company name to get a full version of O&O Defrag 10 Professional

O&O Defrag 10 Professional Edition is compatible with both 32-bit and 64-bit versions of Windows Vista and Windows XP.

Update: O&0 Defrag 11 Professional Edition free license key download.