Since the last windows update, all the Windows modern UI apps don't show.
Here is a short story of the problem.
My windows boots to the classic desktop, let's assume it is empty, no apps running.
I press the windows button, the modern UI desktop appears, with this nice modern metro look full of colored rectangles.
I then click any of modern UI apps, but it just flashes and the screen reverts back to the classic desktop, empty, with the modern app icon on the taskbar.
I then click the icon on the taskbar, the app flashes and again the classic desktop appears empty.