Hi Rickey, did you solve this?, I have the same thing, it happened immediately after today's windows 10 update, it says it is the SmartScreen and clicking on things seems to relate to Cortuna and ease of access. I have two screens and it appears on the primary one (unplugging the second one gives me the completely white screen as the picture). The screen covers everything, it apprears that I can access programmes from the second screen but they pop up behind the white screen so I cannot do anything (settings or task bar). This is the only thing on the net I have found referencing this, hoping for some good advice. Computer is a HP Pavillion desktop and I have a Nvida video card in it. Best wishes, Paul