Harry,

Got the white screen to display from the projector now, but still not working...

1. Windows in full screen mode, Einscan USB ports all connected, and attached to Windows 8.1 with projector displaying Blue screen flashing PC CVBS
2. Plug in Mini DP adaptor with VGA from Einscan scanner already hooked up, let screen display flash a few times, and you should see a second display.
3. This second display will be arranged to the side if Multiple Displays is set to Extend these displays,but the resolution will be wrong, as I think the Einscan projector is a 1024x768 one defeated in their software to 800x600.
4. Click on the blue Advanced settings in the same dialog box, and you should see the Generic Non-PnP Monitor and Parallels Display Adapter, and the projected desktop from the scanner will have a Windows background
5. Open up the Einscan software and the screen will change to white

The only problem is doesn't respond to the Scan button, and you don't get any lines projected
Getting closer...

Calibration is doing something at the moment.

Mike