@ifacedown, unfortunately these on-the-fly defragmenters can actually slow you down; so while they seem good in principle, reality is a little different from that.Windows 8 and above is already efficient in defragging the system. It runs automatic defrags on schedule - just forget it but you could also do a manual defrag. The only thing that it cannot do is preventing the fragmentation on-the-fly.
If you want to prevent fragmentation on-the-fly, you could use Diskeeper and PerfectDisk. They redirects writes on the HDD to prevent at least 85% fragmentation.
I added a Poll, but left a choice for Other. I would like to recommend upgrading to SSD (OS) + HDD (Files) combo. Depending on your situation, this may or not be possible, but the improvements are outstanding. You could always use Windows Defrag (Optimisation) if you're using a newer version of Windows.Hi, so I have access to either one.
I bought the piriform bundle some time last year & O&O from a promo. Before I install, which one leaves the least fragments & does the job the fastest?