Hi,

How to Change Your Router's Login Information
1. Enter your router's IP address into your favorite web browser.
2. Log in with the default username and password (both admin, usually).
3. Go to settings.
4. Select Change Router Password or a similar option.
5. Enter the new password.
6. Save the new settings.

Belkin Router Setup
Belkin Range Extender Setup

Hi,

But if you want a general walk-through of setting up your home network, these steps should get you fully connected.
1. Check Your Internet Connection. ...
2. Place the Router. ...
3. Connect to Power. ...
4. Connect to Your Internet Source. ...
5. Access the Router's Web Interface. ...
6. Connect Wired Devices. ...
7. Connect Your PC or Device to Wi-Fi.

Belkin n300 setup
Belkin WiFi Extender Setup

Hi,

To log in to your router and access its settings:
1. Launch a web browser from a computer or mobile device that is connected to your router's network. ...
2. Press Enter or click Search. ...
3. In the router login window, enter your user name and password. ...
4. Click or tap OK or Log In.

Belkin Router Setup
Belkin WiFi Extender Setup