I've downloaded NFS World from official site and done the updates, however when I open the game at the lowest resolution and lowest texture at some point (after about 2-3 minutes) the game hangs and repeats last played sound (like drifting) and then carries on playing.
This repeats 3-4 times then my computer restarts automatically.
I've tried Heaven Benchmark and open hardware monitor and they reported about 90% GPU memory use!
I also tried Prime 95 torturing tests and reported 100% CPU usage (which is normal for that test) but people say that it should run for hours to heat up the CPU, but it heated up to 81 C in about 3 minutes.
My PC specs :
CPU : Intel(R) Core(TM)2 Duo CPU E4500 @ 2.20GHz
GPU : Nvidia GeForce 7300 GS
Ram : 2 X 1GB
OS : Microsoft Windows XP Professional Service Pack 3 (build 2600)
Sound Card : Realtek High Definition Audio
EDIT :
a blue screen of death came today when it hanged: