If you cannot do this, you will have to find the computers MAC address so that you can enter it into the router manually: Note: Make sure that you are using the computer that works with your Internet connection and disconnect all other computers from the router. This article will help you configure MAC Spoofing on your NETGEAR router to bypass the 'locking' your ISP has configured on your connection. This is called 'spoofing the MAC address. To fix this, you will need to configure the router to pretend to have the same MAC address as the ISP 'approved' computer, instead of its own.
MAC addresses are a unique number or identifier built into modems, routers and other network hardware. Some Internet Service Providers (ISPs) allow only a certain number of computers to connect to the Internet by default. They do this by 'locking' the connection to the unique Media Access Control (MAC) address of your computer.