The best way to handle a missing TerraTec Home Cinema serial number is to first check your registry on your old machine. If that fails, like SichboPVR or ProgDVB is the most reliable way to get your TV tuner working on modern versions of Windows without the headache of hunting for legacy codes.
TerraTec is a defunct consumer brand (RME now focuses on pro audio). Do not waste time searching for a “master serial.” Either locate your original sticker or replace the device with a modern USB tuner (e.g., Hauppauge, AverMedia) that doesn’t use archaic serial-based driver locks. terratec home cinema serial number best