I have a Dell Studio 15 notebook, and it just started turning off by itself yesterday.

Could it be that the CPU is too hot? I have had several notebooks before and every one of them I can put them on the bed without any problem. This Dell Studio Notebook, however, seems like have the air / fan outlet pointed outward from the bottom back of the notebook, so I suspect that the air is partially blocked when it is on the bed.

Are there Win 7 tools that can monitor the CPU temperature, or will some 3rd party tool be needed? (I try to stick to official tools nowadays).

Also, it is running Win 7 Ulitmate, there is actually no utility or background service from Win 7 or from Dell that detects when the temperature is too hot (or 95% near the max), pop out a message box giving a warning and say that the computer will go into sleep mode in 1 minute, but instead just turn off the computer by brute force (cutting out the power) right then and there?

Update: it turned off right in front of my eyes -- it is not doing any windows update or anything. just normal use and jooooop, it turned off.