For some reason, sometime in the past month Creative Cloud will not give me access when started from any of the normal methods; the Task bar Shortcut, the Start Menu shortcut, or even directly from double clicking on "Creative Cloud.exe." It starts in the background but does not appear on the monitor. This is confirmed with Task Manager. I have found that if I use Task Manager to "End Task," I can start the program (from any of the above methods) by choosing "Run as Administrator" and it appears on the monitor and I have complete access.
Today, I updated to the newest version and the situation remains the same (except, that before I did not have to "end Task" in Task Manager prior to "Run as Administrator.)