I have also been reach by reports like mentioned here. It seems as Windows Vista is not well designed for Cad and other modeling programs. I can?t figure out why so much resources are taken by the Vista OS itself. For me it?s more intresting to have the resources left for my programs like VectorWorks. I would really like to see VW for Linux very soon! Then one could choose how much resources are consumed by the OS by choosing a light version or a more heavy one like Kubuntu. And yes, you can get that transparent aero look and more, but with much more resources left for your prefered programs like VW....