i recently uninstalled limewire and now there is a box coming again and again saying one or more neceessory files appear to be invalid. please tru installing limewire again..and when i try to install again then it says older version is running try closing it down first.....how can i get ri from this..its really irritating....plz help

Make sure LW is fully shut down. When it is closed, go to the application's folder, and delete it. Then re open it. Check if that solves it.