It is not exactly the same, but clearly your Windows folder does not look to be a space hog at all.
I misread your first post. Your windows folder is not as bad as mine
. Please sort the program showing the full hard drive, this should help you track space use. You can also see files such as pagefile.sys and hiberfile.sys(do not remove these, they have to be removed or resized properly).
Since Windows does have junction points for compatibility with users folders, you may be seeing those 2 times. This would cause the issue you are seeing. Under normal circumstances these holders should actually be not allow you to view contents so unless you did some kind of permission modification, they normally do not show up as taking space.
For example if you went to c : \ documents and settings \ your name \ You would see what looks like an extra copy of your files, but they are just pointing back to c : \ user \ your name \
Again, under normal use it should not show up.
EDIT Windows 10 may just show/be able to see more info.