[U2Lynne]

Get the mac address from each computer, it is unique to the computer. Then in the Security tab (at least that is what it is called on mine), you can add each of the mac addresses. You also need to make note of the 'name' of the router (for us it shows up in the main screen labeled as "SSID"). Then, go back to the PCs and the wireless connection and it will ask what wireless network it should look for and you have an option to input a name. You input that SSID and it looks for it, sees that it allows that PC because of the mac address and then connects.

That is all for our computer, so yours may be different.