After installation I navigated to the D: partition, however, the explorer simply says that this folder is empty.
under properties, the D: drive is still 37GB full and 231 GB empty, I do not have any other partitions.
You think that you have not an extra partition and there are no files, well my friend, think again will I say, because when you install Windows 7, than will be there also invisible files just as system drivers.
Windows 7 installed the system on that way that you think and says to yourself: What the Hack, what is that now, I haven't extra partition and it is empty, but when you delete that partition; it is possible if you uninstalled the security, that your system will be crashed immediatly after deleting.
Belief me, my friend, you are not happy with that.
You can only see the invisible files with advanged program.
So here is a wise solution, don't try remove the security and that partition, if you do that than are you in deep troubles.
I am sorry for this message, but what I did tell is for 100 percent true.