The hardware accelerated decoding function provided by your display card is unavailable for selection because you switched to an unsupported display mode, .
Please exit PowerDVD, select a display mode with lower resolution and a smaller palette, and start PowerDVD again. If this message appears again, please update your display driver with the latest version.
I am on 800*600 and 16 bit colour, nothing special. I did try and put it onto lower settings and as expected that did nothing.