What (e.g., black screen, no audio, app crash) are you experiencing?
Modern fast-startup options and memory integrity features can clash with legacy capture drivers. If your PC crashes when you plug in the capture card:
TVR 2.5 relies on older DirectShow and DirectX 9 frameworks. Windows 10 uses DirectX 12, which sometimes drops backwards compatibility for niche video capture devices. Step-by-Step Installation Guide for Windows 10 64-Bit