O&O Defrag is a third-party disk defragmenter for Windows favored by system administrators and computer enthusiasts. Unlike the default Windows Defrag, this software defragments the entire hard drive instead of just the space currently in use. Best of all, it speeds up your system by sorting your files in order access. O&O Defrag will put the most-accessed files on the fastest parts of the drive, while the Windows utility pays no attention to this.

As a holiday treat, the company is giving away its O&O Defrag 10 Professional Edition software free of charge. Register and download it here.