Requirements:
- LG Optimus
- USB cable
- Rooting package[Here]
- Backup your device.
- Download and extract the rooting package onto your desktop.
- Make sure to back up.
- Hard reset your device to clear the data from your device by Press and hold the Volume DOWN+Home+Power buttons together.
- After seeing the LG logo on your display , remove your finger from the power button.
- Then hard reset your device from the options.
- After mastering reset Enable USB debugging in your device, by Navigating Menu-->--Settings-->--Developer options-->--USB debugging.
- Connect your device to your PC via USB cable.
- Open RunMe.bat file from the extracted folder which will be on your desktop.
- Select the option to root your device.
- And you should be rooted finally!