Now that is interesting Norm I have an IBM Think pad with xp pro installed on it. I only have vue4.2 installed on it and was using it as a rendering tool not that it performed very well due to the limited ram I think. Not sure what the problem maybe however I understand this must be disturbing. I do know however Vue4 pro can really take up a lot of ram fast and I am not sure if a laptop can handle it. You got me thinking now however and I will see if can install it on my laptop. Thanks for the interesting problem to test out. Regards