Hey There, I am Sofia Carter. If your computer displays an error message HP Printer driver is unavailable, then that indicates a corrupt printer driver is installed or outdated driver software. To eliminate this error message, you should install the printer driver again, follow these steps to proceed. Press Windows + R keys together and type devmgmt.msc, and hit enter. Now from the list of devices, select yours and right-click on it and select Uninstall. Now visit the official HP website and click Support > download drivers > enter printer model, now download the driver software to your computer. After installing the HP printer driver is unavailable issue will be solved.