Sorry Brink, should have clarified. I meant mentioning in the tutorial that Options 1 and 2 will cause the outline to appear, so people don't have to dig through this thread.

Can you state this in the tutorial?

For me, the black squares are present for a while after booting (5 minutes?) but then go away.
If that doesn't happen, try restarting File Explorer after a little bit.

Edit: Just tested, and...

Followup: found the culprit for the transparent square issue. Both the registry edit and the direct fix in the OP use a resource from imagres.dll in System 32. I went into that file and found this at...

If anyone tried Brink's solutions but still hasn't been able to get rid of the transparent squares, try using



as the data value for 29 instead. This fixed the issue for me beautifully.
...