1. Fully shut down your device (unplug from dock if you have one)
  2. Remove any external devices such as a tablet cover(keyboard), wireless mouse/keyboard, USB storage device, etc...
  3. Hold the power button for 45 seconds and then let go of the power button.
  4. Push the power button once to boot up your device.
  5. Log into your device. Connect your tablet cover if you have one.  Re-dock your device after signing in.