There are some important steps are written below to change the WiFi name and password of Dlink Router , Please follow these steps :
First of all , you need to login into the router and for that make sure your devices is connected with dlink router wirelessly or with hard wire.
Open your any browser on your computer and type the IP address that is 192.168.0.1 on the address bar of your browser.
You will reach at the setup page of your dlink devices where you need to login into the router with the help of username and password . please leave all these field blank and just click on login.
Now you are in your dlink page , please choose setup menu and then visit wireless setting over there , here you will get all the options to change the setting , please change your wifi name here and password and click on save . it will take minute or two to save the settings and then you good to go.
Open your web browser and enter http://192.168.0.1 into the address bar, the default username is Admin and the password is blank (nothing). Click Login.
Click on the Setup tab at the top and click Wireless Settings on the left side. click on Manual Wireless Network Setup.
Scroll down the page to "Wireless Security Mode".
This is the section where you specify the wireless password. You can specify a new password; be sure to click Save Settings at the top of the page once complete