Share iPad internet connection to PC over USB
This has been discussed on Super User:
How to connect iPhone's internet to Windows PC via USB cable?:


  
  Install latest iTunes on Windows PC
  iPhone Settings -> Mobile -> Personal Hotpsot -> ON
  Select "USB Cable" on window that pops up
  Connect iPhone to Windows PC
  
  
  The latest version of iTunes needs to be installed, because that will install the drivers required for Windows to see the iPhone as a modem and use it to bridge a connection to the internet.