previous shutdown due to thermal event

Dell System board for dell optiplex gx27...
February 4, 2011 at 05:57:37
Specs: Windows XP
A few days ago I suddenly found my PC powered off. After turning it on again I got the waring "Previous Shutdown due to thermal event". Windows XP startup screen appears and immediately the PC is turned off again. When I startup in safe mode the system comes up and Speedfan shows normal temperatures. So I shutdown and restart Windows in normal mode. No POST messages this time but again after the Windows XP screen the PC turns off. I can repeat the scenario indefinitely. In safe mode the PC will just keep on running with no thermal issues, according to SpeedFan. What is wrong here? Is there a registery setting that keeps turning off the PC in normal mode? Any advise would be greatly appreciated.

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February 4, 2011 at 06:52:36
Post your device temps recorded in Speedfan.

It would not be the registry that controls the thermal reboots, it would be your BIOS.

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February 4, 2011 at 08:53:22
Well, i'm afraid this isn't very helpful: SpeedFan only reports my harddisk temperature. It shows 38 degrees Celsius.

Can you explain why Windows comes up in safe mode (and in fact still is at the moment) but immediately (in seconds) shuts down in normal mode?

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