I have a lenovo u400, my processor is an i5 and it run around 50 C when doing normal browsing. runs at 60-70 C when watching movies or light gaming. My Tj. max is 100 C, never seen it pass 75 C. I just bought my laptop a month ago, so I don't know what's the deal. When I touch the bottom of my laptop is feels pretty cool.
I have ran malwarebytes and MSE and have not found anything. I have also ran a memory test and everything looks fine.
It usually happens when I'm watching a video from a website. My computer just reboots, no bsod or error message. I don't know what to do next. What can I do to troubleshoot this further?