How to restore with itunes?

it's simple: connect your iPad to your computer and launch iTunes (if it's PC). If you are connecting to a Apple/Mac, run finder app. Everything will start automatically. In case the tablet is disabled, insert the cable into the computer then, while holding down the home button in ipad, connect the plug to the tablet (still keeping the home button pressed). After a few moments, the tablet will start in service mode and iTunes (or finder) will ask you whether to update the iPad or restore it (removing all saved data irretrievably). If your data is stored in iCloud, it will be recovered when you install the device (after restor). Update mode do not remowing any data.