If you want to add your HP printer to your Windows device you will need to download HP printer drivers from 123.hp.com/setup first. The link will take you to the HP driver and software download page from where you can download the necessary drivers. Once you have downloaded the recommended drivers on your Windows computer install them manually and then you can add your printer to your computer. For your ease, you can also download HP printer software such as HP smart app for HP assistant. This software can help you with the printer setup as well as managing your HP printers.