I've use ccleaner & have TuneUp Utilities which all keep my system in tip, top condition. However from about a week ago my system just hangs on shutting down. It refuses to shut down & power off itself & just sticks on the Shutting Down screen with the little motion class at the side.

I've all up to date drivers & gone through the usual checks but nothing has changed from before & since its started & im out of idea's to what it could be.