> We rebooted the laptop, and as soon as the BIOS screen showed up, the fans 
> started spinning like mad. We waited for them to slow down.

What software was running then while you were waiting?

> The solution in the end was quite simple. Reboot with the laptop hot. The 
> fans spin up to full power. Rather than waiting for them to stop, just 
> start installing. The fans remained at full speed until the system 
> soft-reset onto the new kernel. After that they appeared to work 
> "normally".

I notice when I boot up my Vista box, that every fan runs at full blast 
until some point during Vista boot, whereby first the CPU fan virtually 
turns off, then a few seconds after the desktop appears the GPU fan 
virtually turns off, all I can hear then is just occasional blips of hard 
drive head movement - until I fire up a 3D game, then all hell breaks loose 
again :-)

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