O&O Defrag Free Edition is a free version of one of the best tools designed to defragment hard drives running on Windows 7, Vista, XP and 2000. The free version of O&O Defrag in relation to its paid equivalent has been deprived of many functions. The authors left us with support for 32 and 64-bit architectures, the ability to use the computational power of many processor cores and two disk defragmentation algorithms.

O&O Defrag Free Edition (just like the paid version) is also equipped with simple defragmentation wizards that will quickly guide you through the full process of configuring and optimizing the hard drives installed on your computer. In the case of defragmentation algorithms, we have a quick defragmentation method that defragments files without combining free space and an optimization mode that combines free space on the hard disk (consolidation of free disk space).