You might want to check the available drivers for the ATI card; any way you slice it, both ATI and Nvidia produce -gaming- cards, and both tweak their drivers to provide better gaming performance in benchmarks. That can play the merry hob with graphics programs, as they don't push polygons and lightsources around in the same way. Nvidia was the demon of Vue4, for example. One set of drivers let you run, another set led to crash after crash, none of them really ever allowed OpenGL to run properly. Other ideas. That is a P4. You might want to disable HyperThreading and see if that is interfering with the installation or stability. HT is still pretty much a 'new' thing, as there is low use of it comparatively, so the inevitable bugs and conflicts are still falling out. VuePro is HT aware, but that still doesn't mean it might not be interfering. Since you are running XP, try turning -off- all the stupid little dancing puppies and other eye candy. That can get into a fight for control with other graphics programs, and those tied into the OS tightest generally win the fight. Outside of that, I'd have to know a lot more about the actual system and configuration...