PML Driver HPZ12 is a background driver installed on a hard drive to communicate with a variety of HP printers. It handles non-printing related communication tasks between the computer and the printer.
The types of communication a PML Driver HPZ12 handles include ink levels, paper-empty conditions, paper jams and so on. HP support recommends that users leave this task running because without it, users will not get relevant information to improve the printing process. However, the driver has experienced problems running properly with certain programs.
First, ensure it is not running on a server operating system. Next, make sure the computer's firewall protection allows the process to function normally. Finally, if there are still issues, try updating the driver.