Windows 10 blue border around everything

This is one of the most frequently asked questions I receive, having writtenĥ articles on the "Windows 10 Black Border" problem already: I have googled the issue and found your article ' How to Fix: Windows 10 Black Border (Shrinking Screen)', but I don't see the windows registry entry that starts with 'DALR6 DFPI'.

I have tried updating the video driver and restarting. My screen has two big black bars on either side of it taking up approximately 2 inches on each side, shrinking my available screen.