In the last two days, my Emac OSX has been shutting down suddenly without notice, usually when I'm in the midst of using Photoshop Elements to edit or print photos. The screen goes dark and the printer (Epson 825) goes down at the same time, but not the other lamps etc. plugged into the surge protector. When I turn the Emac on again, it starts right up as though nothing had gone wrong -- without any kind of disk scanning or error message. Does anyone know what I should do, or how much of a problem this is? I'd appreciate any help you can give.