Printer is working I am unable to Scan

[cg4dawin]

I have preformed countless steps across the internet and none seem to fix me problem.  I am having multiple user across multiple OS with this issue.  

Here are the steps that ultimately solved the problem for me:

1. Go to Programs and Features
2. Uninstall
   a) HP LaserJet Pro MFP M426f-M427f
   b) HP LJ M426fM427f Scan HP Scan
   c) HP Smart
   d) I.R.I.S. OCR
   e) HP Dropbox Plug-In
   f) HP Google Drive Plug-In
3. Run C:\HP_LaserJet_Pro_MFP_M426f-M427f\Utilities\Scrubber.exe as Administrator
4. Press the Windows button + X then select Run, then type %temp% and enter to open the Windows temporary directory
5. Select all of the files in that directory (Ctrl-A)
6. Delete all of the files in that directory
7. Empty the Recycle Bin
8. Set firewall to trusted network (check the instructions for particular firewall software)
9. Go to Device Manager
10. Uninstall Devices and Related Drivers (item a should take care of items b-e)
    a) Printers -- HP LaserJet Pro MFP M426f-M427f PCL 6)
    b) Imaging Devices -- NPIA56DE9 (HP LaserJet MFP M426fdw)
    c) Print Queues -- NPIA56DE9 (HP LaserJet MFP M426fdw)
    d) Software Devices
          i) NPIA56DE9 (HP LaserJet MFP M426fdw)
          ii) NPIA56DE9 (HP LaserJet MFP M426fdw)
         iii) NPIA56DE9 (HP LaserJet MFP M426fdw)
    e) WSD Print Spooler -- NPIA56DE9 (HP LaserJet MFP M426fdw)
11. Go to Devices and Printers
12. Remove the device NPIA56DE9 (HP LaserJet MFP M426fdw), if it exists
13. Restart the computer in Safe Mode (see https://support.microsoft.com/en-us/help/12376/windows-10-start-your-pc-in-safe-mode )
14. After restarting, Press the Windows button + X then select Run, then type cmd.exe to open the Command Prompt
15. Type sfc /scannow and enter to begin the scan and repair process, which might take 15 to 30 minutes to complete.
16. Restart the computer as usual
17. Find and download the printer firmware, if any
18. Find and download the printer software and drivers
19. Download HP Print and Scan Doctor http://ftp.hp.com/pub/printers/hppsdr/HPPSdr.exe
20. Run the printer firmware, if any, as Administrator
21. Once the process is finished, turn the printer off and back on again
22.  Run the the printer software and drivers installer as Administrator
23. Run the HP Print and Scan Doctor as Administrator, it should find your printer, select fix scanning problems.
24. After the Windows (WIA) Scan error is discovered, unplug the printer for a few seconds as directed, plug it back in, turn it back on, and restart Windows.
25. Be Patient! After Windows restarts, do not do anything. Simply let the HP Print and Scan Doctor process in the background (you can't see it working, but it is). It can take anywhere from 15 to 30 minutes for it to complete the scans and repairs in the background. Have faith!
26. Once HP Print and Scan Doctor finishes, click continue. It should finish the rest of the scans successfully, including the Windows (WIA) Scan.