Wow, I'm so sorry, I forget about this threat!. Thanks for requesting me.
Ok, you almost did it. I think you have problems with the configuration of the connection. Click on "Start", go to "control panel" and then double click over "network connections". Over there you will see the networks devices, one of them should be the wireless connection. Right click over the icon, and then click on "properties". In the new window, select Internet Protocol TCP/IP
and click over the properties buttom. You should see something like this
. Select obtain and ip automatically and also DNS automatically and the click in ok and ok once again. Test if you can connect to the network.
If this doesnt work for you, then you will have to configure manually the ip address and the DNS servers. If you don't know what to write there, you can copy the numbers from one of the others computers with good internet connection but you will have make one change. In the "IP address" field, on the good connection computer, you will have something like 192.168.1.2 - you will have to change the last number to another one, for example 192.168.1.3 . And that's it. You only will have to copy the internet properties options from the good connection computer, to the hanvon.
Hope that helps!