Follow The Below Steps:

• Get the Wireless Router and connect an Ethernet cable to your router on one side and on another side to your PC or Laptop.
• Plug in your wireless router to the power supply.
• Wait a few seconds to start the router, and make sure the light of the router gets turned on.
• Open the Web browser (Recommended, Chrome) on your PC and configure the router.
• Visit the default IP Address of your router (You can search the default Gateway of your router in Google or find it in the back panel too).
• From the Particular IP Address of that router, you need to sign in there. 
• Enter the sign-in username and password. Depending on your router you can find the default username and password. As default, many routers have a username as admin and a password as the password.
• Get signed in with login details and go to the Network Name, and enter the unique SSID Name for your Wifi.
• Set the new Password from the Network Password setting. Choose the encryption method as WPA2 Personal.
• Connect the device and enjoy.