I recently bought a HP Officejet 6500, which has the ability scan and fax, besides the default printer functionality.
Howvever, it turns out that the drivers on the CD-ROM and HP website do not support Windows 7. I already tried running the setup.exe in compatibilty mode and I even tried manually installing the .msi packages, with no success.
I am almost certain that there is no actual problem with installing these drivers, as Windows Vista drivers work in almost every case on Windows 7. I am guessing there is simply a hardcoded "block" in the setup file which does not allow me to install the driver.
Besides running application in compatibility mode, is there any other way to actually trick an application into believing you run another OS?