Disconnect the iPad from the computer, but leave the USB cable connected to the computer.
Hold down the “Sleep/Wake” button for several seconds until a red slider appears. Move your finger across the slider to turn the iPad off.
Connect the iPad to the computer while holding down the “Home” button to turn on the iPad.
Release the “Home” button when you see a message that says, “Connect to iTunes.”
Launch iTunes. iTunes will alert you that it detects a device in Recovery Mode.
Click “OK” and click “Restore” to reset the iPad.