I am trying to fix a problem for an architect friend of mine. He's a hell of an architect but not much of a computer jocky. He is running a P4, Windows XP Sp2, 1G ram, NVidia GeForce FX 5900XT video card. He installed Autodesk Architectural Desktop (standard install - no errors) and ran it for approx. 3 weeks with no problems. After he returned from a vacation, whenever he clicks on the icon to run autodesk, the software starts to load and then freezes up at 92%. No changes to his machine have been made and this error starts to pop up now. I uninstalled the software and re-installed with same results. Upon doing some research, I discovered a registry cleaner for this particular software and did another uninstall, then ran the registry cleaner and re-installed. This time we got to the prompt to enter his codes to register the software. This went through and we printed out the reciept and then got the very same error - the software starts to load the default window, template, command window, etc., and freezes @ 92%. I am baffled and can find little about this particular error anywhere on the internet. Does anyone have any experience with this? Thank you for your help. What started out as a little favor for a friend has turned into a lot of my time. Ross