On a daily basis, thousands of users are using HP printer for printing needs. It is sure that people face minor or major technical problems with their printing machine. The error may be minor or major technical fault, so users can face any error anytime. I am also a user of HP printer and experiencing HP printer driver is unavailable error. This error is taking place due to corrupted or outdated printer driver. I know the reasons of this error, but I am not able to solve HP printer driver is unavailable error. So anyone can help me to solve this error completely from the root.