If you cannot find your original key, modern for TV viewing and video capture include: DVBViewer: A popular paid alternative for TV tuners. NextPVR: A free, standalone media center and recorder.
Launch the Setup.exe from your installation media.
Many "top" Google results for these codes are actually designed to look like helpful file shares. Searching for these codes today is less about finding a working license and more about the struggle of keeping aging hardware alive in a modern Windows environment.