Windows 7 - Windows 7 unable to control my cpu fan

Hardware specs:
Asus W3J Notebook
Intel Mobil 945PM Express chipset
Intel Core 2 Duo T2400

After booting and using the machine for a while, Windows 7 will not turn on the cpu fan as the processor starts heating up - and after a while it will hit critical temperature and shut down. If I reboot or go into sleep mode however, they will be turned on. I assume this is done directly by the BIOS as Windows 7 now will not slow down my cpu fan once my processor starts cooling. I did not have this problem in XP, which was what I used prior to a fresh install of Windows 7.

So in effect, Windows 7 isn't able to control my cpu fan at all - and the temporary workaround is going in and out of sleep mode when my cpu temperature hits around 60 degrees celsius in order to get a decent speed/noise ratio on my fan.

Steps taken to try to fix this
* Updating the chipset drivers
* Installing ACPI drivers from Asus
* Cleaning the CPU fan and blowing out dust
* Installing various Asus performance tools and other misc. utitilites - none of them are able to do anything but get a reading
* Booting into Ubuntu from an USB stick, to check if it could be a BIOS problem. Ubuntu is able to control my fan just fine.

I am completely at a loss as to which step to take next. Any help or point in the right directory will be greatly appreciated

the guy in the last post seems to have fixed it but its hard to understand

ASUSTeK Computer Inc.-Forum- Vista ACPI Fan control trouble