: Always reboot your computer after installation to ensure the Windows 7 kernel recognizes the new hardware interface. Troubleshooting Common Issues
Go to Avermedia’s website → Support → Legacy Products. Search for “A857.” You may find a beta driver for Vista 64-bit, which can sometimes work on Windows 7 64-bit if installed in compatibility mode. Driver Avermedia A857 Windows 7 64 Bits LINK