Win8 GAMES - Specifically Solitaire

I've got games set to a window. Been working for many months. In the past couple of weeks when I select a game (Solitaire in this case) it pops up in a window, then the dots that form a circle to tell me it's setting up, stop. After a few seconds it then goes back to the Full Screen Windows 8. I select Solitaire again, and the same thing happens. Uninstalling Solitaire and re-installing didn't work. Rebooting didn't help. Uninstalled ModernMix and now Solitaire works fine in Full-screen. Going back to re-install ModernMix to see it that helps. I'll be back...