disable the iphelper service. Edit: Saw the screen shot now..
1. Turn off the iphelper service, set to manual. This stops the warning dialog from popping up.
2. Open the Network and Sharing Center, click "Change adapter settings", select the adapter being used, right-click and select "Properties".
Uncheck the box next to "Internet Protocol Version 6 (TCP/IPv6)".
IPv6 is on by default in Vista/Win7.
3. Restart machine.