Some problems appeared on me because of my graphics card. My Vue 4 doesn't work properely with my GeForce mx400 - I found its because of its driver. But Vue 4 Pro is working without any problem, I never try Vue 4 with my new GeForce fx5200. I'm currently using Windows XP Pro with Sp1 & Sp2. I don't have any problems with Vue 4 Pro now. But I cannot import a tree object I exported on Cinema 4D 8.2. I exported it as a 3ds object but Vue 4 pro can't import it (crashed).