That pic looks exactly like several Win 7 installs on VMware that I have done over the years, I remember trying to defrag it and for some reason never quite getting rid of the last few blocks at the end of the drive , I think they were the folders with the $ sign in front of them after disabling file sharing I was left with 1 block I think. I remember using Windows defrag multiple time with little change then trying Defraggler several times and that changed it a bit more but it defiantly wasn't worth the time it took
Edit: Defraggler will tell you what is in those blocks at the end of the dive if you click or mouse over them ( can not remember which one )