Every time I leave my puter I "Shut Down"... Then have to go through the rigmarole of starting up, signing in etc.. Does it do any harm if I were to just put it in Sleep Mode or Hibernate.. ??? Even when I go to bed... Does it use loads of electric or does it harm the puter..? Still have to start up, but what I was doing/looking prior is there straight away and don`t have to open anything.. Ta..