I had a problem recently which related to my power supply turning my PC off when I tried to play any game. Since you're using a laptop, this may not be the case, and it probably isn't considering your computer isn't turning itself off.
Anyway, download Speedfan, like ynvaser said. Look at temps, and also take a screenshot of the voltages on the bottom part, below the temps.
Download Prime95 and run a stress test, may dictate if it's your CPU giving you troubles.