Defraggler Aborts

My boot drive (C drive is 100 GB). No personal files stored on this drive - only system and program files, etc.

Defraggler aborts, when defragging this partition. I even run Windows Defragmenter first, and invariably Defraggler will abort.

Any ideas, or suggestion. Defragmentation might be a few 100 or few thousand files - approx 5% max fragmentation. Sometimes only a few files.

If a file is open, should'nt Defraggler just skip the open files and move on to the rest and complete/

Thanks.

os version?

5% is probably system files. You will notice no difference at all between 0% and 5% your worrying over nothing and over-defragmenting your drive trying to "fix" what's not broken

My boot drive (C drive is 100 GB).

any chance this is a SSD?