To set up your HP printer via 123.hp.com, first ensure your printer is powered on and properly connected with ink cartridges installed and paper loaded. Then, visit the official site 123.hp.com/setup to download the appropriate printer driver and software for your specific HP printer model and operating system. Follow the on-screen instructions to complete the installation, including connecting the printer to Wi-Fi, if desired, using either the touchscreen or button methods provided by HP. HP Smart app, available for Windows, macOS, Android, and iOS, can be used for an easier and faster setup process[1][2][3].

Key steps:
– Power on your printer and load ink and paper.
– Go to 123.hp.com/setup on your computer or mobile device.
– Select your printer model, download the driver/software.
– Run the installation and follow prompts to complete setup.
– Connect your printer to your wireless network via the app or printer interface if wireless.
– Use the HP Smart app to manage your printer and print from your device.

If you encounter OS compatibility issues or need further help, HP Support and community forums are available for troubleshooting[1][5].

This process applies broadly to HP DeskJet, OfficeJet, ENVY, and other HP printer lines. For video guidance, tutorials on YouTube show detailed Wi-Fi setup using 123.hp.com/setup and the HP Smart app[4].