Thanks for stopping by the QuickBooks Community. I appreciate you for sharing this information here. From what you've explained, it appears that QuickBooks may be encountering an error which prevents it from recognizing your scanner. To troubleshoot this, you can perform a Clean Install of the software. Here's how:
>Uninstall QuickBooks Desktop:
>Rename the Installation folders:
>Reinstall QuickBooks Desktop:
Try this and let me know what your results are. If you're still having this issue with the scanner, I'll provide other alternatives to get you back up and running. If you have any questions about this info or anything else QuickBooks, feel free to reach out to me here in the Community.