Being an older machine, my computer system tends to become fragmented quite easily. Because I am running an older machine with 6 drives, including 2 external, I find that Iobit's 'Smart Defrag 5 Pro' has served me very well. 'I have been using Iobit products for a good many years now.

Smart Defrag's updates include a new defrag engine, specialized Game Defrag, a cool new look, and many more language options (35 and counting).' Cnet Its SSD Trim tool automatically enables system tweaks that typically require experience to apply. 'IObit Smart Defrag optimizes your PC to take full advantage of SSD performance while defragmenting your hard disks.