X51 R2 random restarts, blue screen of death

Service tag 

I don't know if I'm still under warranty or not.

The problem started two days ago.

When I watch a stream video or run a game, my PC will randomly restart. When it does it will not be able to boot back up. The power light will be dimmed on and off and the fan will run crazily like a car revving the engine.

I may drain the power and wait a minute before restarting. It can reboot but the problem repeat again if I load a game or stream.

Sometimes right after I rebooted and leaving the PC idle, the blue screen of death pops up. This happened four times so far.