I can now write that I've spotted this enough times to call it a bug. To get it to happen on demand is really hard but it was in some full screen app and then the Alt+Tab key was tapped one and it was the blank screen. Pretty odd but Alt+Tab 2 times got it to a desktop screen.
Also, the Charms did work so I'm guessing you want this fixed.
You did nothing wrong here and I wish you the best of luck with the machine's maker and Microsoft.
I'm using Windows 8.1. When I have the desktop showing and click on either the Windows key on the keyboard or the Windows icon in the bottom left hand corner of my screen I get the page showing all the "tiles" for things like Mail, Store, OneDrive etc.
So far so good. When I then click on one of those tiles the "Tile Page" completely disappears but its icon then appears in the bar at the bottom of the page. If I then click on that item it flashes up on the screen for about 1/50th of a second and just leaves the icon at the bottom of the screen again with the screen display reverting to the desktop. This happened earlier in the week and rectified when I rebooted. However it's gone again now.
Has anyone else had this problem and how can it be rectified?
Windows 8 is crap. There was nothing wrong with XP.