Hello and Welcome to TSF,
Go here for driver:
Note: HP has stated you can use a vista driver for windows 7.
How to install printer:
1. Download the vista driver for this printer.
2. Plug in power cord to printer and turn it on. ( do not plug in the USB cable at this time)
3. run the installation that you have downloaded
4. Plug in the USB cable when it has notified you to do so.
5. After installation completes, restart computer.
6. Your done.