Step 1 Download kingroot and start Windows.
After double-clicking the desktop icon as follows, you will see the interface

Step 2 Enable USB debugging mode manually Now the LG device.
USB debugging mode is already active, proceed to the next step. If this familiar, follow the instructions below. a way to enable Android versions are different.

Step 3 Connect the LG PC via a USB cable.
Use the OEM wiring. If none, use the one with the best quality. the first time to connect this device to your computer, kingoroot will automatically install the device driver software for you.

Step 4 "OK" Click on the computer to the USB debugging permissions.
a prompt appears on the device to connect to computers on Android 4.2. So make sure your device's screen. "OK" authority, or to connect your device and fails to stay offline. it is your personal computer, so rooting process will be smoother "Always allow from this computer" option.

Step 5 Click "ROOT" when you are ready.
Android Rooting is a sophisticated thing. You should think twice before rushing into it. DO NO ROOT FOR THE SAKE OF ROOT. Read the notifications carefully and then proceed by clicking "ROOT".

Step 6 Rooting now...
It will take a few minutes for KingoRoot to run its course. It will try every possible script untill it succeeds or fails.

Step 7 Root Succeed or Fail.

Kingo Android Supported models You can visit the page