Start Killer is a light, free tool that lets the user remove the Start button from the system bar, gaining space in this area of the desktop. And also, when you close Start Killer, the button returns to its usual place.
Despite the fact that the Start button has been removed, you can open the Start menu by using the CTRL+ESC combination or the Windows key. Start Killer places an icon within the system bar, and right clicking on it opens the program configuration.