Error messages requiring factory restore

I bought my son a Nobis 9" tablet and have had lots of troubles with it. I just made it through the newest of them.. all the error messages you could think, before suddenly going back to the "Go" screen and sticking. I finally found a site explaining how to get to the reboot menu and once again did a complete factory restore. Its working now but what do I do to stop it from happening again?? He is so frustrated loosing his levels and scores in apps.

Error messages included

"unfortunately the process com.google.process,gapps has stopped"

"unfortunately the process android.process.acore has stopped"

"email has stopped"

"google process has stopped"...

It goes on and on!