Hey, my fix in 'power management' did not help, so I came back here and looked for another solution and this is what I found: Turn your computer off, and then push down on the power button, and hold it down for 60sec. Then it will do its normal reboot and it will be ok after that. I'm not highly tech savy, but I have two of these laptops that are almost identical and I had the same issue with both of them. I tried this fix, and I have not had the issue again in either computer for a week now.
I hope this helps you.