Can open the tuner stream directly via "Open Capture Device."
If the official driver fails, the open-source community created a modified driver called . This driver removes the date-check and signature requirement. You can find it on the OBS Project forums. Driver Avermedia A857 Windows 7 64 Bits LINK
: This site provides the specific driver files for the A857 model. You can find the 64-bit version on the AVerMedia A857 Download Page DriverIdentifier (OEM Specific) Can open the tuner stream directly via "Open Capture Device
, you generally need to use drivers provided by the laptop manufacturer or specialized driver repositories, as it is an older model. Direct Download Links Lenovo Support : You can download the official AVerMedia TV Tuner Driver for Windows 7 (64-bit) which was released as a recommended update. DriverScape : This repository offers a specific AVerMedia A857 USB Pure ISDB-Tb driver for Windows 7, 8.1, and 10. DriverIdentifier : This site provides the specific driver files
For the , you can find the Windows 7 64-bit drivers through the following sources: