123 HP Deskjet 5810. 123hp.info simply assist customers to Setup, Install and Troubleshoot HP Deskjet model Printers. Once the basic setup is complete, install the printer software by visiting 123.hp.com or by inserting the CD which came with the printer. Follow the instructions on the screen to complete the printer installation process. Download the driver software from the website link 123.hp.com/dj5810 or 123.hp.com/setup 5810.