After upgrading from Windows 8 Pro with Media Center to the 8.1 preview, I need some help in being able to watch live TV again.

When I try to now, it says Please Wait. Searching for tuners.

I tried reinstalling the software for the Hauppauge WinTV DCR-2650 TV tuner, and upgrading the firmware for both the tuner and the Cisco STA-1520 tuning adapter.

I also tried swapping around the USB ports, cold-booting the devices, and running the Set Up TV Signal setting in WMC, but that says The TV signal cannot be configured because a TV tuner was not detected.

Both devices look fine in Device Manager, reporting the "This device is working properly" status.

I'm not sure if this is related, but I did have some network connectivity issues immediately after upgrading to Windows 8.1 where my either my subnet mask or default gateway was missing, and since the TV tuner shows up as a network device, I wonder if that might be related. However, I really don't know how those settings should look and Hyper-V sort of further complicates things with the virtual Ethernet adapters: