Press and hold the reset button on the router for 10 to 30 seconds. The location of the reset button varies depending on your router make and model, but it is usually located in a small pin hole on the side or back of the unit. Insert a straightened paper clip into the hole until you feel press down. Your router is now set back to its factory defaults.
Sign in and reconfigure the router following the reset. Connect a PC to an Ethernet port on the router. Open a Web browser and navigate to http://192.168.1.1 / or http://192.168.0.1 / or http://192.168.2.1 /. A window will open, asking you to sign in. On older routers, leave the username field blank and type admin for the password. On newer routers, the default username and password are both set to admin.
Navigate to the Wireless Settings tab after you've signed in and set a new administrator password. For better security, choose a password comprised of random letters and numbers. This makes it a password that is harder to guess.Write down this password and save it in a safe place for future reference.
Then enable WEP or WPA in your Wireless Security settings so that leechers cannot jump on your wireless network.Save this passphrase security key in a safe place.