If you're unable to find a compatible driver, consider reaching out to Avermedia's customer support directly. They may have more specific advice or a newer driver available that wasn't listed on their website.
Even with the right LINK, you might encounter these issues: Driver Avermedia A857 Windows 7 64 Bits LINK
Since the official AVerMedia global site primarily lists newer capture cards, you may need to use archived or third-party repositories. Below are the most reliable options for Windows 7 64-bit: Lenovo Official Support If you're unable to find a compatible driver,
AVerMedia A857 (often recognized as the AVerMedia USB Pure ISDB-Tb Driver Avermedia A857 Windows 7 64 Bits LINK
The A857 uses an older WDM (Windows Driver Model) framework. Use Windows 7 compatible software :