Diskeeper Professional 2008 - Powerful Defragmentation Software

Over time your HDD becomes fragmented. As you delete and create files, you create new regions of free space. Your free space is not in one big chunk at the end, but instead just a number of small holes all over your disk. And sometimes it is impossible to allocate new files contiguously, and your operating system has to break them into fragments, putting a small piece here and a small piece