Hello everybody, Im looking for an expert who has already used IsoDraw interacting with "quad core"-computers. I have got a new Dell computer with quad core 3.0 GHz processor (4GB RAM) and a NVIDIA Quadro FX 1700 graphic board with 512 MB RAM. Windows XP is installed. The computer runs very fast. It was possible to reduce the the computing time up to 50%. But the computer often hang up abnormally and an auto restart follows. I do not think that the quality of the components is low, because the computer has been replaced by an new one yesterday. The â€œhang upâ€� problem is still existing. Now I assume that IsoDraw does not get along with the four cores. Could anybody help me please?