If you have some scanner issue(e.g slow reading speed) or you want to reset the barcode scanner setting values, you may load the barcode scanner factory reset.
The scanner factory reset is a different feature from the device factory reset, it allows you to restore the scan settings to default values.
Point Mobile devices with Barcode Scanner engine
2. Click Scanner Settings
3. Go to About Tap
4. Click Load factory default button
5. When the factory reset is done, click Done to exit