Once I noticed that in Ubuntu Desktop 14.04 LTS, after uninstalling some installed applications through the “Ubuntu Application Center”, when you click on “System Settings”, the window with the parameters no longer opens.
To solve this problem, I ran the gnome-control-center installation command:
sudo apt-get install gnome-control-center
After that, the “System Settings” began to open, but there were only five icons.
Therefore, I installed unity-control-center:
sudo apt-get install unity-control-center
After executing the second command, the icons became larger and the “System Settings” became as before.