1. What is the operating system of the PC you are trying to install this on (Windows XP, Windows 7 64-bit, Mac OSx, etc)?
2. How are you trying to install it (USB or wireless)?
3. Are you getting any error messages?
--Setup and Install HP Photosmart (B209)--
I hope the link above helps. If not, please answer the questions so I can try.
Good luck!