Intel stock fan broken?

[Smashkirby]

This is really annoying me. When I turn on the intel stock fan and try to install vista, it runs for a while. About a minute later, the fan starts slowing down and eventually shuts off. Had to shut down the computer in the middle of installation. It's a socket 775 intel fan on an E6750. Do you guys have any idea what could be happening?

 

[INTELCRAZY]

Sounds like the setting in the BIOS might be set for it to go off when the temperature is below a certain level... I would check that first and if nothing is found there, I would install a new cooler. The stock coolers are crap anyway... I have noticed a lot of improvement in noise level with the Core 2 Duo's coolers though