Get started with your all new HP printer by downloading 123 HP com setup from 123.hp.com/setup. Once you visit this URL, enter your device, i.e. your specific HP printer model number (mentioned either on the front or the back of the machine), and get it registered. If you forget to register your printer, you won’t be able to download and install the drivers and other essential software required to make the most of your printer. For downloading the necessary software from 123 hp setup, make sure you follow the correct instructions.