I think I have figured out my reboot issue. I have the latest update from a few days ago and it was updated after I had done a factory reset. I left the tablet fresh without any apps for a day and a half and it did not reboot. Yesterday I installed the Facebook app and within 10 minutes the tablet rebooted. I quickly uninstalled the Facebook app and it's been good since. I used to use my tablet in the morning and by 6 pm, the tablet would either be stuck in the reboot screen or off completely. I'd suggest uninstalling the Facebook app and see if your tablet stablizes.