If you are concerned about damaging your system, you might want to find a third-party defragmenter.ĭefraggler: This software is a free program that helps you defrag individual files and folders. There are several free disk defragmenter programs available on the Internet, but which one is best for your computer? You may think the best option is the Windows built-in one, but the fact is that the free tools don’t defrag your files as well as a paid program.