dynctmu

Thanks for the answer, that's actually really close to what I did! I found out that Windows' defrag tool did not include files more than 64 MB on it's task, just like you said, so I started to use Defraggler for all files above 64 MB using the "File List" tab you mentioned, it really finished in like an hour or so. I also, no matter how big or small it was, started to defrag the files with the most fragments (there were files with about 2,500+ fragments) to a certain point and at the end, the 34% fragmentation has dropped to 6% using this strategy. For that 6% of fragmentation, I used Windows Disk Optimizer and as there were no files above 64 MB with any fragments, it worked for the rest of the files, so I managed to completely finish the defragment process. 0% fragmentation currently. Use Defraggler for files above 64 MB, use Windows Disk Optimizer for any other file and it might just save you lots of time (I'm talking about days).

Yes, but I don't think it is good enough, that's why I'm using Defraggler. About 2 years ago I used both with Windows Defragmenter being first, and after WinDefrag completely finished it's job, Defraggler still showed that there's still a lot of fragmented data in my PC. @nukecad Any advices for my previous posts?

Just an update: Even after cleaning up my PC and restarting the defragmentation, about 5+ hours have passed and Defraggler still shows 0% progress. Remaining time is still being calculated too. I had an idea to try and run boot time defrag for once, in hopes of putting some large system files (such as pagefile.sys) aside to make defragging faster. That did NOT have an effect on Defraggler. The issue persists.

Just one, I also set the limit of max usage for System Restore to 7% (about 65 gigs). Just went ahead and moved about 100 GBs to an external drive, guess it's my lucky day because I didn't know that people in my household had this much of useless files. The drive now has about 25% of free space, above the 20% limit as you mentioned, but I'm currently not observing any changes on Defraggler's speed. It still is unbearably slow. Still no ETA either.

I started the defragmentation like about 16+ hours ago, left Defraggler overnight to do it's thing and woke up to a 0% progress. I know that it's usual for defrag to take a long time but it's weird for a PC which: -Is in safe mode, -Has no other programs running, including any tasks in the background (double checked in Task Manager to ensure, nothing is using resources other than Defraggler and maybe MS Defender with your usual system processes like explorer, svchost etc.), -Had a full cleaning both by CCleaner and Windows Disk Cleanup prior to starting Defraggler, -Has Defraggler's task set to real-time priority (highest possible) in Task Manager > Processes tab. I also enabled the "Stop VSS when defragmentating NTFS volume" option in Defraggler's settings and it's a Quick Defrag, not even a full one. There isn't even any ETA, the remaining time is still being calculated since I ran defrag. I cleaned up my drive as much as I could but it's not going any higher than 15% free disk space, it's a 1 TB Seagate Barracuda HDD which I had for 13 years. I didn't have any signs of disk failure since I built this PC (I ran a chkdsk command with sfc /scannow and a couple of DISM commands like a day ago, not a single error was found to fix), but there is about 287,9 gigs of fragmented files/about 33% fragmentation. I'm adding the screenshots of Defraggler's current state, maybe that can be useful. Any help is appreciated, thanks.