According to HP support page ( Here
When you attempt to install your HP product in Windows 7, you cannot find a Windows 7 driver for your product.
The drivers for your HP product are already included in the new Windows 7 operating system! You do not need to download drivers to use the product . Simply connect the printer to your computer with a USB cable, and Windows Update automatically installs the driver for your product.
With the in-OS driver, some of the buttons on the product do not function and some of the advanced product features are not available. For more information about your in-OS driver, and to see workarounds for lost functionality, go to our Frequently Asked Questions below.