Good Afternoon: I am suddenly faced with modern UI apps that, when clicked, start for a few seconds then disappear. At the same time, I am unable to view notifications or the calendar from the clock in the task bar. When I click on them, I see the blue circle blink on then disappear, but nothing happens, no notification screen or clock settings. I have checked group policy and registry and no problems there. I have the same setup on 2 computers, and one works without problems and both have the latest updates from Microsoft. I should also mention that the Edge browser is the same, pops up for brief second then disappears. Everything was working yesterday and I have made no changes to settings or devices. Please advise.