Hello, I have just purchase a new hp printer and when i started to install drivers then it shows error like “Unable to install”.I searched on the internet i found HP Helpline Number and also visited HP Support website, they advice me some Useful suggestion, but i need more helpful suggestions.
Hi jessica, i found helpfull website for your problem, on that site explains how to install the printer driver correctly, here the link http://yourprinterdrivers.com . i hope it can fix your problem 
This message is because unmatched driver already in your system. Go to Control Panel → Uninstall (or Add/Remove programs) option. remove any printer driver and try againg by downloading lates printer driver with desired model and try installation.