The primary download has the Basic Driver which is the recommended download for your device to provide basic functionality. (71MB)
For the Driver plus the Full Feature Software go to Alternate Mirrors and choose the second one (file name CDB-AmericasEuro1-Express_NB.exe) Which includes the HP Photosmart Software Suite (enhanced imaging features and product functionality). This download is 477MB.
Here's other similar drivers that are different versions or releases for different operating systems: