You should download and install your graphics card software from
NVIDIA then download and install these two updates:
DirectX (You need this whether you running DirectX 9, 10 or 10.1)
C ++ for Vista 32 bit
Once thats done reboot your pc and then download
HWmonitor. Run HWmonitor and begin playing a game in windowed mode so you can play the game and see all the temps etc when playing.