DisplayLink not working on Windows 8.1 Embedded Pro

[shizzzon]

I have an AOC 1649fwu (actually two of these) and they will come on, but only with blank screen.

I have Driver version 7.7 beta installed and have tried 7.6 and not working.

The monitors DO work on another system so i know it's not hardware problem.

I am using 2 Asus AMD R9 280s that are not in crossfire.

I have attached Log as compatibility check passed fine.

I have contacted AOC about this and they have absolutely no idea what the conflict could be.