It's hard to know for sure. Some 18's did have an issue with poor VRMS on the motherboard so hopefully it's not a sign of these failing. The diagnostic is a good way of testing hardware but it doesn't always find every hidden issue. You can try some easy things like trying one memory stick at a time or swapping out your SSD/HDD for a new one. Also try a different power plan and sleep/hibernate settings.  If you can get your hands on another power supply then give that a try (even a 240W adapter will work for testing) or even try removing the battery and see how it performs with only the power adapter.  Make sure the BIOS is up to date (upgrade one BIOS version at a time if it is out of date) If all else fails you could try testing without your GPU's installed.   
Hi guys. I'm having trouble booting into Windows on my 2013 Alienware 18 R1 and was wondering if anyone in the community has seen this issue before?When I turn on my laptop, I make it past POST and get to the loading screen with the blue Windows logo. My laptop always shuts itself off on this screen.Video showing the problem: [URL] There is one way I have found to boot up successfully - run the Alienware pre-boot diagnostics tool, let it finish, exit the tool, and then the PC will reach the desktop successfully after it restarts. From this point, I can use the PC as I normally would installing software, playing games, restarting, shutting down the PC and turning it back on - no problems at all. However, if I shut down the PC overnight and try to turn it back on the next day, the problem recurs and I'm back to square one.Other clues: Wondering if anyone knows what might be wrong with my machine. Is there anything I can do to fix it? Just trying to figure out my options really. Thank you.[IMAGE]
18 R1, shuts off on Windows loading screen