I'm going to assume you don't mind short battery life since these options practically demand you stay plugged into an outlet always.
I'd go with either a MSI Dominator or Titan, Asus Republic of Gamer G75***, or a Sager NP9870.
it's either power related (ie power cord, power button or power supply), motherboard (bad news), malware (since you can boot into it), driver crash, or over heating.
I have a Clevo W860CU that came with an i7-740QM processor in it. I've had no problems with the laptop until about a month ago. On boot up into windows 10 the monitor would show the windows logo and the circles starting to spin but would then shut itself off. I could start the laptop into the...