After updating to Windows 10 anniversary edition it seems OK on first glance, I get to the login page, I enter my pincode, and it moves forward.
Then, everything is black. Well, almost everything. I can see the windows 10 upgrade advisor but only because I can read the title of the window. Everything else is black.
If I right-click just on the outside of the advisor window, just above one of the corners, I can see the corner and part of the vertical edge disappearing (painted black) in what I assume to be the context menu for the desktop.
Sure enough, if I pick the bottommost item (by guessing) of this menu I get the personalisation window for Windows 10. In there text and colors are readable. If I pick the theme settings, hoping the theme has been corrupted, another black window is opened up.
So how do I fix this?