Have a new laptop with Windows 10 and can't add my HP Officejet 5740 series printer. Hp Support Printer Drivers Windows 10. The computer does see it but says Driver is Unavailable if you try to use it. Had an error message saying the 'computer has a policy that blocks NT 4.0 drivers from being installed.
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Went through all the steps in a help file downloaded from HP called 'Installation Failure-Unknown Device.hta'. Followed it to the letter but it didn't fix the problem. Uninstalled software (more than once), restarted and re-installed. Tried connecting through wireless, USB from printer to computer and Ethernet directly from router to printer, all to no avail.
Keeps asking for a WPS Pin, finally found that in the router configuration. Lenovo Y50 70 Drivers For Windows 10. Every time I type the 8 digit pin into the box I get a message saying it doesn't work.