Just installed it from filehippo.com

Defraggler does a very complete work but nevertheless it's a little slow. I found a way to get the job done quicker, using two -free- defrag software:

1. Disdefrag to begin
http://www.auslogics.com/en/software/disk-defrag/download
is really very very fast and usually ends the job in a few minutes. Seen from defraggler side, it defragments only about 50% of your files but MUCH quicker than Defraggler. Once done, you still need Defraggler for the reamining part.

2. Defraggler to finish the job.

All this is very empiric but believe me, you get your desired result (a clean disk) quicker.

Thanks for a nice tool