I just installed Ubuntu 13.10 alongside Windows 7. Everything works perfectly fine except for the internet. In edit connections it just shows an ethernet connection when I boot onto Windows 7 the wireless connection works fine but it doesn't work in Ubuntu. I tried creating a connection but it didn't work either.
I encountered this issue a couple of times and I solved it by changing the password's encryption type. In Edit Connections, click on your WiFi network, then Edit, then head to the WiFi Security tab and double-check if it is set onto the correct encryption, e.g. WPA2 if that's what you have.
You can check what encryption is used on your Win7 install in the Network PrefPan. I hope this helps!