Free defragmenter from the creators of CCleaner
Notes: IMPORTANT: This is a special version of Paragon Total Defrag, free for home users. You need to fill in the form on the developer's website and wait for a confirmation email. Then login to Paragon's Electronic Service System with the credentials provided in that email and download Paragon Total Defrag from there. The serial number doesn't work with the trial version of Paragon Total Defrag.