After the driver is active, you can use (included in Windows 7 Home Premium and Ultimate) to scan for channels. Go to Tasks > Settings > TV > Set up TV Signal to begin .
Before we give you the LINK, let’s understand the problem. Avermedia officially ended support for the A857 (C027) after Windows 8. When Windows 10 and 11 introduced stricter driver signing (WDM / Kernel security), Avermedia chose not to update the legacy C027 drivers. Driver Avermedia A857 Windows 7 64 Bits LINK