I have tried several times, to update the printer list by clicking the "Windows Update" button on the "Add a Printer" dialog window. I always get the message, "Windows was unable to get a list of devices from Windows Update. Try again later". Since I have install Windows 10 1803, I can not update the printer list anymore. Anyone has a solution for this problem?
Go to the printer manufacture's web site and see if they have a driver to download. What brand name and model number is this printer? (maybe we can help you find a driver)