I've successfully installed Windows 7 (x64) and drivers for my printer hp Laseret 2015d, and have no problem printing with this setup.
There is another PC in the network running XP SP2, and I want to share the printer so that users of that PC can also print.
On W7 I have the option of installing additional printer drivers for other system architectures (Itanium and x86). I've downloaded the most current 32-bit drivers for the printer, but every time I direct the install dialog to the folder containing the drivers, I get the following error message: