I'm sorry about the issue. What's the model of your new HP printer?
What's your Mac OS X version, i.e., 10.6, 10.7, 10.8, etc.?
Is the printer connected to your laptop with a USB cable? Or is the connection wireless?
Which step are you stuck at?
Is there any error or message when setting up the printer on your computer?
Please reply at the box below. Thank you.