unable to launch both demos

[the DXM]

I tried the demo for both overture and BP and I get the following message on startup:
"NVIDIA display driver files from different (incompatable) versions of the driver have been detected.

NVIDIA OpenGl acceleration is disabled in order to maintain system stability.

to resolve this problem update the NVidia display dirver
the latest driver is available at http://www.nvidia.com."
an immediate critical failure always follows. I can only presume that the full game would exhibit the same issue and would like to discover the source of the issue. I currently have the newest drivers that I -can- use for this particular laptop and card, and while they are not the latest release from NVidia they should certainly be updated enough...

just curious what would be the possible source of this error.