First thing I want to point out. Everything is 100% up to date. I did a complete wipe of Windows and reinstalled all updates.
UE4 is on Version 4.20.3
I am using a 1080i and that is on Version 416.34 which I downloaded this evening.
So, everytime I mouse over anything and I do mean anything my screen flickers black.Mouse off and back on, another Black flick. This happens for literally every single button in the Enginer Editor or even in the Project Manager.