Ditto Mark. But I am thinking of something far more fundamental. A new Video Card was installed. Now, I AM assuming the old one WAS removed - of course it was. As this is NEW hardware, maybe a new Authentication Code is required to make Vegas work. After all it IS the video stuff that is under question here?

I'm also thinking, installing a new VidCard, how WOULD Vegas take note of it? Maybe, again, a fresh install of Vegas is required? Not my call though. Up to our friend here.

Grazie