Make sure your computer is connected to the internet and then connect the product to the computer using a USB cable.
Windows 7 detects the hardware, automatically installs the correct driver,
and you do not need to download any software.
If it does not automatically detect it, the printer is likely already installed.
Use Windows Update to make sure you have the latest drivers available on your Windows 7 operating system and make sure the HP device is set as the default printer.