Get a free license for O&O Defrag v15.8 Professional (32 or 64 bit version). Yes, the current version is v16 but this version is pretty recent. As regards defraggers, modern OS's and file systems, I think they still have a place (i.e. consolidation before shrinking a partition or maximising contiguous free space before some heavy-duty video editing). If you don't think they are needed or you are are happy with the one built-in to Windows then good for you… nothing to see here… move along.
You will need to create an account on the site.
Note that the DownloadCrew will be listing three or four other great freebies between now and 2nd January. Based on their past offerings they are usually excellent (Pro versions rather than "Special edition" or "Home edition").
Lastly, details from the site (and remember they are talking UK time):
This promotion will run between midday Saturday December 22 to midday Monday December 24, or until the system runs out of available serial codes. If the system runs out of available codes, this offer will expire early.
http://store.downloadcrew.com/?act=details&id=29126
They're also offering version 16 for $9.95