Random Laptop shutdown solved

I was experiencing random shutdowns of my laptop (Lenovo 3000 N 100). I observed that it occurred when the CPU was too hot. I concluded that it was due to overheating. However, I was not using any application that chould overheat the laptop. I played with few computer settings and this issue was fixed when I changed the power plan to "Power Saver" or "Default". This issue occurred when the power plan was on "High Performance".