If HP printer driver is unavailable then it is probably because the installed driver is not compatible or outdated. In this case, you will not be able to print till you have access to the latest or the best fit hp printer driver. To fix this issue, you are required to uninstall the printer by going to the control panel. Wait for few minutes before you reinstall it. Connect the printer with a USB cable and followed the instructions displayed on the screen. Let it install the required hp printer drivers and once it is done, your issue of unavailable hp printer driver will be resolved and you will be able to print easily.