Não tenho certeza se você resolveu esse problema. Apenas compartilhando essas informações de outro blog que me ajudou a resolver um problema semelhante.
So i finally found the solution. I'm not even sure anyone will ever enter this thread again, but I'll post it anyway, because this issue drove me insane and i hope i can help other people in this situation. SO, apparently windows 8.1 drivers are flawed, and in order to fix this, you have to download windows 8 or 7 version of the driver. You then have to run it in windows 7 compatibility mode(right click-properties-compatibility tab-check the compatibility box and select windows 7) and voila! Just install it as usual and you're good to go.