Doc, yes, I think you're right.
Fortunately, I got a laptop today with which to work off site and it *does* run DirectX. One guess as to how I tested that!
On the down side, they've done what Raygan mentioned above - they've disabled access to the screensaver tab in the Display Properties and locked in the company saver. My next step is to test whether running MA as a program over-rides that!