C8-C78 VGA not working

I have purchased the C8-C78 usb hub, I have connected it to a hp laptop with windows 10, but the VGA port does not work, the other ports do work correctly. I have tried with two different monitors and two different cables, windows 10 does not detect the monitors connected to the vga port. What I can do? Could it be that the C8-C78 hub is faulty?