General My Thrive factory reset on its own. Why?

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http://androidforums.com – Hi everyone, I'm hoping to find some help here. I've had my Toshiba Thrive 16GB for about a month now. On Sunday I hit the power button to put it to sleep, like I do 20 times a day, but this time it wouldn't wake up again when I hit the power button again. Battery was at 80% so I know it wasn't dead. Not knowing what to do, I held the power button down for about 20 seconds to get it to reset. I've done this once or twice before without ill effects, but this time when it reset, I was greeted by new-device setup questions. The Thrive had been reset to factory defaults. I didn't think this (General)