To download the HP printer driver from 123.hp.com, you need to follow the below-given instructions:

1. First of all,  open a web browser, for example, Mozilla Firefox, Google Chrome, Safari, etc. on your system. 
2. After that, type 123.hp.com in the address bar which is located at the top of your screen. Then, press the Enter key from your keyboard.
3. On the webpage, select your printer from the upper panel i.e Envy, Officejet, Laserjet, Deskjet. 
4. Now, type your printer model into the search field and then click on the Search button given there. 
5. In the next window, click on the Download button and by doing so, it will start downloading the driver. 
6. Once the file is downloaded, it will automatically be saved in the Downloads folder. But if you want to save the file in some other folder, you are required to do it manually. 
    

Downloading HP Printer Setup from 123.hp.com/setup for Mac can be installed by the below steps.

1. Using the USB cable, connect your printer to the Mac device.
2. To install canon printer drivers automatically, click on Add Printer.
3. Wait for the complete installation.
4. In case if you face issues with the above steps, then download the setup from 123.hp.com/setup.

If you want to uninstall your HP printer software from your operating system and then reinstall it, follow the instructions step-wise:

1. Start the Windows operating system and type ‘Devices and Printers’
2. Search HP Printer and right-click on the HP wireless printer software and choose the ‘Delete or Remove’ option.
3. Press ‘Windows’ and ‘R’ keys together to ‘Run’ the command.
4. Now, type ‘printui.exe/s’ in the ‘Search Bar’ and hit the button of ‘Ok’
5. Open the ‘HP Printer Driver’ and if it gets detected, click on ‘Remove’ option
6. Remove all the other instances of HP printer software
7. Restart the operating system, before that close all the tabs
8. Once the PC starts after a while, download and reinstall your HP wireless printer via 123.hp.com/setup page.