I am having the same problem. But i noticed that when I reboot the cpu speed changes sometimes, it decreases, and if i reset i goes back to the normal cpu speed which is 2800+.
I've tried the settings on the bios but the problem remains the same it does freezes when windows starts to boot.
I also notice that the power(according to my power tester (pc/sps tester)) has failed...
Maybe if the power is replaced then it should work...
but any other suggestions will be appreciable...
Thanks,[/ for puting it on the net]