Instructions:
You need to have a regular wireless network or setup a wireless adhoc network between your computer and your phone. Then you need set your browser's proxy to the proxy that Tether-X provides to you.
Steps:
1) Setup adhoc network on your computer if you don't have a regular wireless network. More info: http://bit.ly/setupwireless
2) Connect to adhoc network that you have created or the regular wireless network from your phone
3) Launch the Tether-X app and tap 'start proxy engine'
4) Set your browser's proxy to the proxy address that Tether-X provides you. More info: http://bit.ly/setupproxy
5) Enjoy you internet on your computer via phone :)
6) Good luck!
Download the app from windows marketplace.