My system (Toshiba Satellite A660-167 Core i7-740) overheats and turns off. This happens when I play videos online, YouTube or any other sites.
Psensor to check the temperatures. Normal temperature is about 70-80 Celsius. When I watch videos, the temperature gradually increases until it reaches 100° C and the computer turns off.
I suspect this is a problem with the video drivers, but the driver seems to be updated. I have an NVIDIA® GeForce® GT 330M 1GB.