I would say allot of your problum is your 64mb of ram. Heck just opening up windows has to eat 3/4 of what you have leaving you very little to work with in poser. Also 300- 500mb free isnt doing it much good especialy since you dont defrag at all. If you want to render you need all the ram you can get . Use Ctrl-alt-Delete and close everything but explorer before you boot up poser.