I am running Vista. I use my desktop throughout the day - sometimes for an hour and then I do not go back to it for a few hours. I have been shutting it down each time I walk away for more than an hour and then starting back up when I come back to use it. Is it better to use Sleep? How often should I be shutting down the computer or can I just keep on in Sleep mode? I would imagine that the same applies to my laptop? Thanks for any help