You can download the official drivers for the HP Dual Serial USB Thermal Receipt Printer (A799) Go to product viewer dialog for this item. directly from the HP Support Portal Download and Installation Steps Identify Your OS : Visit the Official HP Software and Driver Downloads
: During setup, if you are using the HP-specific driver, you may need to select "HP A799 Partial" from the dropdown menu for optimal compatibility. Port Configuration hp a799 thermal printer driver download link
Note: The A799 is part of the A630 series. Select "HP Photosmart A630 series" and choose your operating system. You can download the official drivers for the
Legacy/Specific Drivers: Some older systems may require the sp51658.exe file (Version 6.1.7600.16385) for Windows 7 or XP compatibility. Step-by-Step Installation Guide If you are installing the Go to product viewer dialog for this item. Select "HP Photosmart A630 series" and choose your