I am running an vista home premium machine with amd x2 5000+ and an xfx geforce 8200 mb. with two gb off ram. My nvidia drivers are current. I am noticing quite a bit of stuttering in the video when i am using large dreams. (like utopia prime) I check task manager and notice that explorer jumps from 75,000 k to 169,000k. This seems like a lot of memory usage. Any thoughts.