I used to have 4 monitors connected on my HD7700 video card. And some windows update happened and only 2 monitors are working. I tried removing one of the working one and the 3rd monitor started working and similarly when I remove 3rd monitor, the 4th monitor started working. So, at any given time only two were working. All the 4 monitors are good because I was able to use two monitors removing the other two and they work.
I have upgraded my OS to Windows 10 Pro and updating the drivers on HD 7700 by installing this driver.
But no luck.
Can someone help me what am I missing?