I've had my Alienware 17R4 for just under two years. As of tomorrow it will get it's second motherboard installed within that time. I was using it last night just moving files around between my laptop and my network when it just suddenly clicked off. That was it, dead. Never came back on. No problems with AC adapter, no over-heating, no nothing. Just..click...dead. I am so disappointed in this machine. I've been in the computer industry for 27  years and have never seen a machine so expensive, have so many problems.