Defraggler is a free Disk defragmentation software that lets you quickly defrag the individual files you want to without processing the whole drive. The new version now lets you even defrag system files at boot time.
Defrag disk, files and system files at Boot-time
Defraggler for Windows PC
This compact and portable Windows application supports NTFS and FAT32 file systems.
Defraggler pushes its capabilities far beyond any other free defragmentation tool by offering complete offline defragmentation during the boot process with full OS support.
Additionally, the UI has been improved with a new Drive Map and customizations. They have also re-architected the internal defrag processes to make them faster and more efficient!
You can also now defrag system files at boot time.
To do so, open Settings > Options > Defrag tab > Check run boot-time defrag of system files.
You can download it from its home page.
Should I use the boot time defrag?
There is a great advantage of defragging hard drives during boot time – it can move some files that are in use all the time when your computer is on. If this advantage benefits you in any way, there is no harm in defragging while booting your system. That being said, you can try this third-party tool called Defraggler, which helps you defrag during boot.
Is Defraggler better than Windows Defrag?
Considering all the features, options, and workflow, you might find Defraggler is slightly better than the built-in functionality that Windows 11/10 comes with. For instance, Defraggler lets you defrag files forcefully, whereas Windows Defrag ignores most of the files at times. As a result, it might not work properly as it should be. That is why Defraggler is better than Windows Defrag.
You might also want to check out some of the best free defragmentation software.