I just got my hands on a the Venue 8-7000 and I was a little surprised to discover there weren't any development drivers available for Windows 8.x.
After some digging/experimenting I managed to get it working. It required getting the hardware IDs via the device manager and manually adding the fields to the Google USB Drivers.
Full write-up is on my blog here:
Hi, my app only work un WiFi, why not in mobile conection,,