Generic Non-PnP Monitor

Since installing Vista Ultimate, the "Monitor" entry under my Device Manager
indicates "Generic Non-PnP Monitor", telling me that my Gateway Plug and
Play monitor is not being recognized as "Plug and Play".
I have updated my NVidia GeForce 6200 Turbo Cache display adapter to the
most recent update. Still my monitor is not recognized as Plug and Play.

My Nvidia Control Panel is not helping with this. (unless the place for the
setting might be hidden in a "secret location" that I still haven't
discovered)

Where else can I go in my system to see how can I fix this? Does Windows
Vista Ultimate might have a fixable setting somewhere that might resolve
this issue?

Thanks in advance.