you sure your cooler is actually spinning since that temp is insanely unhealthily high for something that has no load on it. (also it's away from any heatsource i take it)
sure is, otherwise it's shutdown before windows can even load (I happen to know because I once forgott to reconnect the fan after cleaning it). And yes, it's as far from any heatsource as it can possibly be in this room, and standing right on the floor (where it's always a lot colder when you don't have floor-heating).
My AMD Athlon idles at 35°C and makes me worried if it goes over 45°C...
My BIOS allows manual control over the fan speed. If yours does, spool it up. Also, clean the dust off thefan blades and from between the cooling ribs. Take a tooth pick or something.
interesting... you're using the original cooler?
Unfortunately my bios doesn't allow for manual fan speed adjustement, but I turned of all the regulators that would decrease fan speed based on load, so in theory it should always run at the highest speed (according to my speedometer in Bios 3600 rpm).
There's also the weird phenomenon that if I enter bios, the cpu idles at about 35 degrees. However when it idles in windows the temperature is a lot higher (usually about 55 degrees above system temp when it's clocked properly).
I do clean up my fan every two weaks or so. since until recently I ran it in an open case it clogged up rather rappidly. And I replace the paste every now and then too (also, after an emergency shutdown, the lower part of the heatsink right above the chip is so hot that I can barely touch it, so the heat transmission seems to be ok).