I bought my C91 a few months ago and it worked fine until a couple of days ago. Three or four days ago I was playing Angry Birds and actually worked my way up to level 21. I then started the Reuters news reader app and after reading a couple of articles the thing froze on me with the white screen of death, just a white screen, nothing else. The power on/off was useless so I just let the battery drain. Once dead I plugged it in and let the battery fully charge. The tablet started just fine and seemed to work OK, but then froze while I was watching a video clip. Did the same thing all over again. I started it yesterday and it seemed to work for a while until I got a blue screen of death. Let the battery completely drain, plugged it in and charged up the battery. Now when I push the power button, nothing happens. Before I declare this thing a piece of junk and toss it into the trash and chock one up to experience, is there a factory reset option I could try? Perhaps that will do the trick.