I have a problem with my hp envy 17 laptop. "My laptop just now shut down on its own. Not a regular shutdown, not even a bluescreen. It was like a regular PC without a UPS having its power cord janked out of the socket. " Just like this. And it restarts automatically after two seconds. Sometimes it shuts down after 3 minutes, sometimes after 1 hours. There is no battery, power supply problem. I tried everything about it. I updated bios, turned off second nvidia gpu, cleaned laptop, changed thermal paste, changed ram, formatted windows. Nothing changed.