Is it safe to run disk defragmenter on my machine? By YL ComputingDecember 6, 2022Speed Up PC Yes, it is safe to run a disk defragmenter on your machine. Doing so can help improve the overall performance and stability of your system. Related Content:How do I optimize my hard drive for better performance?Is it better to replace an old hard drive with a new one or to upgrade RAM?Should I upgrade my RAM or processor for better performance?