I apologize in advance if this was answered on another thread and I couldn't find it. Just got a Zenithink 10.2" tablet (OS 2.1), and I want to change the google account that I originally signed in with. To remove the account, the tablet says that I need to do a "factory data reset", which I have tried with no luck. The tablet's screen goes blank shortly after it starts to reboot (I waited at least 20 minutes for it to do something). After turning off the device and restarting, none of my personal data has been deleted. Suggestions?