The Conexant Fusion 878A often appears in as an "Unknown Multimedia Controller" or "Video Controller." Follow these steps to install it manually: Conexant Fusion 878A - The Retro Web

Because Conexant does not provide direct consumer downloads, you must rely on hardware manufacturer archives or community-maintained drivers:

Older WinTV 878 WDM drivers sometimes work in compatibility mode for generic 878A chips. Installation Guide for Windows 7

The BTWinCap WDM Driver is the most reliable community-supported driver for Fusion 878A chips on modern Windows versions.

Various Bt878-based drivers for ECS and generic cards can be found at DriverIdentifier .

The Conexant Fusion 878A (often branded as the Bt878 ) is a classic PCI video decoder and tuner chip that powered millions of TV tuner and surveillance cards in the late 90s and early 2000s. While it is a legacy device, it is still possible to get it running on Windows 7 with the right drivers and installation steps. Direct Driver Download Options