That simply indicates you are missing out on some important updates and you have to install those to mitigate the HP Printer Driver Unavailable problem. Open the Control Panel on your computer, go to the devices and printers, right-click on your HP printer and choose Update drivers. Restart your printer and computer to resolve the problem. If the problem doesn’t resolve then uninstall the driver and reinstall the latest one from the HP support website. Follow similar steps to uninstall the printer. After that visit the website 123.hp.com/setup, go to Identify my device section, enter the printer model and click Submit. Keep following the further on-screen instructions to install the latest drivers on your computer. Hopefully, it helps you to get the latest drivers. For any assistance call the HP tech support number.