Having had all sorts of problems with my Lenovo T42p overheating after the fan blew, even with the fan kept on maximum, I had to find ways to force the temperature down. Â Not cool when trying to run a backup causes an abrupt system shutdown!
I found the answer in the really nifty application Notebook Hardware Control. Â This application allows you to control the various settings on your notebook associated with power management. Â You can assign different profiles for docked and undocked. Â Most importantly, you can throttle down the speed your CPU’s running at by controlling the voltage, triggered by different CPU loads.
By doing this, you can turn your CPU speed — which you generally don’t need most of, given a modern machine — way down. Â I find this useful for keeping my machine cool … but you’ll probably find it useful because by turning the speed down, you can substantially prolong your battery life. Â I find that — even with the fan kept on full all the time — I’m adding another 0:30 or so to my battery time.