A Soft Reset reboots your device and deletes temporary files. Your important files and NOOK registration information will not be removed.
To perform a Soft Reset on your NOOK HD or HD+
1. Make sure that your device has enough battery to restart.
2. Hold down the Power button for around 20 seconds.
3. The device will shut down after you've held the Power button long enough.
4. Once the device is off and the screen is black release the Power button.
5. Press the Power button to turn your NOOK back on. The reset is now complete.
