NVIDIA HAS NOTHING TO DO WITH THE TV RECEIVER BOX OTHER THAN SHOWING THE IMAGE ON THE SCREEN!!!!!
There are no drivers for that device. It is a network device.
Here's the trouble shooting guide:
Here's the software you're looking for:
Downloads for the HDHomeRun
If you have the Nvidia nForce network manager on your computer, you have to uninstall it. That is the only connection to Nvidia there is. And they want you to remove it as it causes problems.