HP's software often does not install correctly. It usually hangs when you plug in the USB cable. I have heard that sometimes you need to do a complete HP software unistall, then a resinstall the HP software, and when it asks you to plug in the usb cable---do a ctr alt del and see if your processor is close to 100% occupied-if so, kill that process, and then plug in the usb cable.
Additional conformation of that would be---is anything on your computer able to communicate with the printer and change anything---if no, the computer is not communicating with the printer-------software and USB cable might as well not exist.
Also make sure you have the correct usb cable for the printer--if it needs a usb -2 cable, a usb-1.1 cable will not work. If the printer just requires a usb 1.1 cable, having a usb 2.0 cable can cause problems. Nor can a usb 2.0 cable be plugged into usb 1.1 computer port. Physically its possible, but the device will not preform correctly in most cases.