i have it on
Control Panel>Network and Internet>Network Connections>
Wireless Network Connection>Right Click >Properties>
and its On
what to do
When it is available on your connection the option will light up and you can switch to it, but you wont notice any significant change.
Please do not bump older threads.
You can delete the WTF folder to force the game to re-detect your settings, but if you are still unable to use this option you may need to speak to your network provider.