During the installation of your printer, the webpage 123.hp.com/setup
works as a medium to download the HP Smart app and the printer driver software. Firstly you need to ensure that you have completed the initial installation process such as connecting printer and computer to the same network (wired or wireless). To proceed further, you will have to open your computer's browser and then visit the website 123.hp.com/setup, now scroll downwards on the page, and click support. The next step is to initiate the drivers' installation process by pressing Download Drivers; after that, you will receive the file extension. Now Run the file and install the required software on your computer; this process will complete the HP Printer installation process. Hopefully, you will be able to navigate through the website 123.hp.com/setup to install your HP Printer.