Chosen Solution

I have reset the tablet to remove my files not I would like to reset it back to the factory settings. How can I do that? I have tried but was unsuccessful. It told me it could not be done

First method: Firstly hold down the Power button, until your device is turned on. Then from the home screen open Menu and choose Settings. Select Backup & Reset and tap Factory data reset. Choose Reset device and select Erase everything to begin hard reset operation. Well done! Your  tablet should restart itself right now. …………………………………………………………………………………………………………………………………………………. Second method: Start by swtiching off the device by pressing Power button. Press and hold Volume Up + Power key for a couple of seconds. You can release held keys when you see an Android Logo on the screen. To enter the Recovery Mode hold down the Power button for a short while. Afterwards from the menu choose “Wipe Data/Factory Reset” by using Volume buttons to scroll and Power button to select options. Tap “yes” to confirm if you are 100% sure you want to clear all your data. Press Power button to enter option “reboot system now”. Cogratulations! The hard reset has just been performed.