shuts down

My SB has begun to shut down, for no apparent reason, it just goes black! I checked the Reliability Hx and all it says is that "Windows was not properly shut down". There is another error that is always present, the "Windows Camer Frame Server" but I don't think it's related because sometimes...

Hello. I have a surface book 15/8 GB/DGP Nvidia/256 SSD I had problems with it shutting down and/or battery drain during sleep mode. A month ago I requested a warranty exchange and I got a new one sent to me. Just to find exactly the same problems. The SB shuts down while on sleep mode and also...