, you can find specialized retail support files and firmware on the NCR Drivers and Patches portal . How to Install the HP A799 Driver
Choose your system type (32-bit or 64-bit). Select Model: When prompted, select or HP A799 Partial from the dropdown menu. hp a799 thermal printer driver download link
Go to 👉 https://support.hp.com/us-en/drivers , you can find specialized retail support files