Confirmed for Windows 7 Professional and Ultimate editions
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. Driver Avermedia A857 Windows 7 64 Bits LINK
: Sites like DriverIdentifier and Driver Scape host various versions of the A857 driver specifically for Windows 7 64-bit. AVerMedia TV Tuner Driver - Windows 7 (64-bit) Confirmed for Windows 7 Professional and Ultimate editions
Disclaimer: This article does not host copyrighted driver files. All instructions point to public archives and official recovery methods. Avermedia is a registered trademark. Driver Avermedia A857 Windows 7 64 Bits LINK
If you have exhausted all options, consider these alternatives rather than wasting hours: