My understanding about Poser fom what I've read and seen in this forum is video card has no bearing on Poser at all. I thik martial and bobbie are on the right track. It sounds like a memory problem more than anything else. Check hard disk space first making sure you have plenty of free space, defrag the hard disk. Check your memory to make sure you have plenty, I had 256 MB RAM and Poser 5 locked up frequently. I have 1 GB of 333DDR RAM now and have had 1 lock up in 3 months and was with 5 V3 and M3 figures in the scene.