Vista uses a different driver model. It is called Windows Display Driver
Model.
http://en.wikipedia.org/wiki/Windows...y_Driver_Model
This is why you cannot use the XP driver.

The issue with printer drivers is somewhat different in that the drivers for
many multi-functional printers do not enable all features. You need to
check the HP site for the specific printer model to see what the situation
is with the Vista driver.

"Andrea Gates" <Andrea.Gates.no.spam@microsoft.com> wrote in message
news:OFo4VFAVIHA.4440@TK2MSFTNGP06.phx.gbl...
> "Colin Barnhorst" <c.barnhorst@comcast.net> wrote in message
> news:CB714094-9561-452D-B531-482CD8CCBD11@microsoft.com...
>> CodeMicro,http://codemicro.com/store/check_price.php?partid=6123, carries
>> these so they may have info on the drivers as well. You will need Vista
>> drivers and that is likely to be tough.
>>
>>
>
> Is there any reason why this monitor adapter driver works in XP, but
> refuse
> to install in Vista? Anyway to force the driver to install?
>
> This is the second driver we have problem with Vista. We also unable HP
> Deskjet 900 series duplex XP printer driver in Vista also.
>