Yesterday, out of the blue, when opening my tablet, the letters DEMO in red appeared on the screen. It's a FINETECH TG166 tablet. I tried every trick in the book from changing the wallpaper to restoring to factory specs, but nothing works. The DAMN letters are still there. Before I ship it back to the company, I try this forum to see. There must be a way to solve this. It's only a machine, for crying out loud!!!