Leave the computer on
I tell the customers that ask to leave them running if they want the convenience of time saving not having to boot. I also suggest they use the hibernation mode for rapid wake, and to aid in power savings. I also place a reminder decal on their PC, that it is a very good idea to open the PC approx. 1 X every six months, and give it a good dust out. It will keep the PC running for yrs. to come, and it'll also give you a chance to give a visual look over, just to be sure nothing has vibrated loose or broken.