I was hoping that would work since it was the easier quick fix. There is another possible solution that requires editing your registry. If you decide to try it, first [
backup your registry].
See step 2 on this page: http://www.winhelponline.com/blog/disk-space-usage-bar-missing-this-pc-my-computer/
These solutions may require a full reboot once completed.
I already had this in my registry and it looks just like this: