O&O Defrag is an excellent example of top-notch disk defragmenter software that offers a multitude of features and a streamlined interface. Its ease of use is almost second to none while its ability to defrag heavily fragmented hard drives wins the TopTenREVIEWS Bronze Award. It offers a relatively easy way to simply defragment a hard drive without dealing with a complex set of options.

Using O&O Defrag is easy and intuitive. It has several novel features such as the ability to examine individual clusters and create reports. Upon launching O&O Defrag, all of a computer’s hard drives are shown and analyzed for problems. Each drive can be examined for disk errors and manually defragmented. O&O Defrag can do more than one drive at a time. During testing of O&O Defrag, we were able to simultaneously defragment an external hard drive as well as a laptop’s main hard drive. Both were defragmented with fast response times on each drive’s cluster maps.

One major difference that O&O Defrag has from other similar programs is that it seems to have an under-the-hood engine that runs pretty much by itself. While a user could change some of O&O Defrag’s settings and set up special defragmentation sessions, much of the program’s processes runs hidden in the background. This makes O&O Defrag much better suited for casual or home users than for system administrators who might require more extensive controls. Other disk defragmenter software sometimes use a more complicated interface.