i dont understand the "put hardware to sleep when possible" option in the energy saving settings. isnt that the whole point of the 'computer sleep' slider ? it lets you choose if you want to put the computer to sleep at 1 minute of inactivity, 15 minutes,1 hr, etc. etc. 1.) why do they also need a "put hardware to sleep when possible "checkbox. is there another function that isnt explicitly stated? what would happen if i left it checked vs unchecked with the computer sleep setting at 15 minutes? 2.) on another note, if i want my computer to run all night should i set the computer sleep setting at "never"? or is there a more efficient method.