Carolyn, Poser really needs a lot of memory to work well, especially if you add lots of textures or have a complicated scene with several props or people. I'm giving it 200 Megs (of the 384 on this system)... on the advice of Zygote/DAZ... and the program has run pretty happily since. Please check to see how much memory you have on your computer, and allocate to Poser more than the "suggested" amount if you can. (One and a half times that is recommended for many programs.) (This is easy on the Mac, I'm not sure how you do it on a PC.) Also, try not to have other memory hogs (such as PhotoShop) running at the same time. Hope this helps! Carolly