Most modern versions do not require a serial key; the software detects the plugged-in hardware to authorize the installation.
For game capture variants, visit the Roxio Game Capture HD PRO Updates page. Installation Guide roxio video capture usb software download
If your computer does not recognize the USB device, you may need a specific driver update. Corel provides a direct USB Capture Driver Download for older models like the C2009. Most modern versions do not require a serial