I have been using defraggler successfully for a few weeks. Did a great job with drive performance if I did both a defrag and a defrag freespace. Both had to run to gain performance.
Then, a few days ago I applied the latest windows 10 update. All went successfully .
Now, defraggler will run normal defrag but defrag freewpace will never complete. It runs for an hour or two and then seems to get stuck. The processor is running full speed but no drive activity. On the drive map a couple of squares will bounce between green and yellow. But it never completes and shows no progress.
Worked fine before the update.