It is possible to stop this 2nd occurrence of LW using your Task Manager. I suspect it may happen when you click/double-click the LW shortcut. Shortcuts are not always reliable. But I'm not sure!

I've had 2 occurences of LW for 2 reasons. One I had a 2nd LW version on the computer. The 2nd was as I suggested earlier. It's probably not healthy to leave it like that. It may be using more of your computer's resources for a start. (By the way how many versions of Java do you have on your machine.)