First, insert the same 3D T620-2D dual-channel VGA acquisition card into the slot above the computer motherboard PCI-E2.0x4..
Secondly, turn on the computer and install the T620-2D driver.
Boot into the device manager, and you can see
Then click the panic sign, right-click to install the driver, find the file to put the driver, and click it step by step to be OK.
Check whether the installation is successful and return to the device manager.
Opinion? Device Manager-Sound, Video and Game Controller (below)
This proves that the installation is successful.
However, during the installation process, there will be a prompt "No digital signature", so please disable it before installation, ok?