Tap that and the Nook should finally load the home screen. In addition to the password you use for your Barnes & Noble online account, your Nook passcode restricts access to the device - if you enable passcode protection, you'll have to input this four-digit code to unlock your Nook before use. After software update repair, I had to 'factory reset' the Nook to OEM. The Nook Color is a tablet computer/e-reader that was marketed by Barnes & Noble.A 7-inch (18 cm) tablet with multitouch touchscreen input, it is the first device in the Nook line to feature a full-color screen.The device is designed for viewing of books, newspapers, magazines, and children's picture books. I wiped the media partitions and successfully interrupted the boot process 8 times. (For those who need to know: It supports Adobe Flash Player.) A ‘Factory’ button should appear in the top left corner of the screen. Your NOOK Color is small enough to hold easily with one hand and to slip into a bag or a purse. Nook color: accessing the factory screen Settings -> Device Information -> Erase & Deregister Device.