When you build it, you should ask it.

One thing that sometimes gets overlooked is registry entries. I had a Microsoft program that somehow got corrupted, and required panels and windows would not show. I uninstalled the program and reinstalled it, only to find that nothing had changed. It was only after I found the registry entries and deleted them all that the program reset and began working properly again. I expect that an uninstall will remove registry entries that the program created, but that is apparently not the case.