I have a nextbook next3 tablet that keeps looping with a force close error message that says process.android.acore has stopped unexpectedly. I click close and it keeps looping. I have tried the reset button on the back, rebooting, etc but nothing is working. It will not let me click the settings menu to do a factory reset or anything. I did root it and installed applanet but that was 2 weeks ago and it worked fine until yesterday morning.