Computer fan alarm

[scaryjim]

it sounds a bit like the latest version of ASUS's PC Probe, but I can't be sure - any chance you could take a screen shot and post it?

[circuitmonkey]

it would be helpful to know the manufacturer and model of the motherboard

[nvening]

just incase your solution doesnt fix it ive had similar problems with friends PCs before. Quite often its because for some reason their house has been warmer or they turned the radiator behind the desk up etc. Fortunately they had adjustable fans so turning the speed up quickly solved it!