Hiya, Thanks for all the responses so quickly!! I didn't realize so many people were having problems.. During the installation, was an icon placed on your desktop automatically, or did you have to do it yourself? I'm trying to figure out if I have a complete install or not; it seemed to go to the end - it said it needed for me to restart my pc; the first time I installed it, the pc crashed during the reboot, but the second time it rebooted cleanly - still won't run. This is the first piece of software that's given me this kind of trouble on this machine. (I'm running 2 other 3D apps, recording software, and numerous games which are notorious for being picky about graphics hardware)