These are the instructions to root Samsung Galaxy Grand Duos GT-I9082 (running on android 4.2.2) using Root Genius Application on Windows Computer.
Requirements: If you are using any antivirus application on your computer, then disable it first before following the below instructions. As because Antivirus interrupts the rooting procedure.
Step 1: Download and install Samsung GT-I9082 USB driver on your computer.
Step 2: Enable USB Debugging on your Smartphone. To enable USB debugging, Open Settings > Developers Option > USB Debugging > Tick to Enable.
(Developers Option is hidden for Android 4.2.2 or above, to show this option Go to Settings > About Phone > Built Number (Tap on it for 5-8 times).
Step 3: Download and Open Root Genius Application on your Windows Computer.
Step 4: Once Root Genius Application is launched, connect your smartphone to the computer (with USB Debugging enabled).
Step 5: Once Your Smartphone is connected successfully to the computer, Root Genius will automatically detect your Device.
Step 6: Now, Click on the “Root Now” button to begin the rooting process.
Step 7: Now, Root Genius will automatically “Root” your Samsung GT-I9082 smartphone and install the KingUser Application.
Step 8: Now your Samsung Galaxy Grand Duos GT-I9082 smartphone is Rooted. To check whether your phone is rooted correctly, open Applications Menu, there you will be able to see a new app installed, called KingUser. If this app exists, then it means you have successfully rooted the device.
Optional: You can also verify the root status of your device by using the Root Checker Application.
[*] No data loss process: Your Samsung Galaxy Grand Duos GT-I9082 Phone Data like contacts, pictures, videos, music and etc will be not affected with this method.
[*] Warranty Void: Your Samsung Galaxy Grand Duos GT-I9082 Device Warranty may be Void after following the above tutorial.
[*] Samsung Stock Firmware: If you are looking for the original firmware for your device then head over to Download Samsung Stock Firmware page.
[*] Samsung USB Driver: If you are looking for the original USB Driver for your device then head over to Download Samsung USB Driver page.
[*] Credits: Root Genius Application was created by SJRoot (Developer). So full credit goes to them for sharing the tool for free.