So the easiest way to resolve this is go to the simplest setup and move forward. I always approach these things as though it were happening to me, and what I would do to resolve it.
First, I would disconnect all but one of the displays. Download the latest version of DDU, boot into Safe Mode, use DDU to clean the machine, and reboot. Then install Adrenalin and get the one display you have connected working properly.
Next I would add just one more display. Using Windows you should be setup the displays correctly. Once you have that done, then add the third display, and repeat the process.
Eventually you should be able to get all your displays reconnected as you want. The trick is to make the process as uncomplicated as possible. And using this method, you will be able to determine at what point the process fails, and then resolve that, provided it does fail.
