I have the exact same problem, It is not in the Power save Options, it is NOT in the SLEEP OR HIBERBATE options, the computer is NOT GOING TO SLEEP OR HIBERNATE.....plz read again....and then again if needed still. The Computer is having complete unexpected loss of power....as in when we come back and press our power buttons, it doesnt restore you to desktop, it boots up all from the start of bios and boot up screen, Ok so now that we are past the "They dont know about power saving option ( 4 Year Degree in Computer Technologies and Communications...I think I know about power save options and I am sure that if the guy who started this post is smart enough to verify the email required to post here, he knows about them as well ^^ ) ANyhow, my specs are below, same exact problem, maybe to much power draw from my vid card? PCI Express 2.0 meaning it is powered by the PCI Slot, but that does not mean it isnt drawing to much from it, also, Power Supply Temp, as a Safety STandard most are set to power off in the event of Over heating, what do you guys think?