My computer has been making beeping noice from overheating. I used Everest to see the temprature and found that it was a bit high.

I opened it up and cleaned the dust (for the first time in last 2 years) especially off of the case fan, and CPU fan.

While doing the above, I also installed an Ultra ATA/133 TX2 controller PCI card (from Promise) and a new 300 gb HD. I attached a HD cooling fan to the hard drive to keep it cool. Farmatted the hard drive and all is looking good.

Started Everest again to see if the temps have gone down. I can click on everything except Sensor under Computer. As soon as I click on Sensor to check the temps, the screen goes black and the computer restarts.

I am running windows2k and I have never experienced this before opening up the case this morning.

I have a dual boot with XP. When running XP, the Everest runs fine. Sensor node doesn't cause the computer to crash and the temps are a bit down.

What do you all think could be causing this?

I have even tried installing WinXP drivers for the controller card on win2k OS, to no avail.

One thing that I have noticed is that the Powersuplly fan is not spinning. I know I need to take care of this but this couldn't be causing this right?

Please help. Thanks in advance.