Hi RTB2014,
Welcome to the HP Forums, I hope you enjoy your experience!
I understand you are unable to scan after updating the computer to Win 8.1.
I will be happy to help you.
Did you uninstall the printer software and reinstall the downloaded drivers?
If you didn't then I would uninstall and reinstall the downloaded drivers.
I have provided a URL to uninstall the printer software.
Fully uninstall the printer in Win 8.
You can download the newest drivers from this link. Select the operating system and click next.
HP LaserJet Pro CM1415fnw Color Multifunction Printer Drivers.
If you are still having issues I would download and run the Print and Scan Doctor since it might resolve the issue
automatically. Find and Fix Common Printer Problems Using HP Diagnostic Tools for Windows.
I believe that this will provide a resolution to your issue. Thank you.
