Yes, quite likely a compatibility issue. CS3 used an older compatibility model, which long has been surpassed by newer versions of DX. However, it still should be backward compatible, so any issues you may have may depend on requiriung a specific driver, installing the full legacy load of DirectX or as a minor, changing some permissions on teh system to allow loading of unsigned legacy drivers and/or compatibility modes. It's a more complex problem than just flipping a switch eitrher way. Check your device manager and then work your way through...
Thank you very much for your interest. Not sure what any of that
means but I will follow-up with local computer technicians. All I
want to do is record videos! I was sure someone else must have worked
out what driver was required. Anyway, will track it down following