Hi,
Firstly this issue is more particular for the Gaming community. I've encountered it a lot, it's easily fixed, but I haven't been able to find it being addressed anywhere.
I play a lot of games, exclusively on Windows 8.1, I've found that there's an issue caused by the Creative Cloud launcher/program, despite being a background process, when I run various full screen games they are force minimized by the program until I manually quit Creative Cloud from the System Tray.
Ones I can recall offhand are:
Titanfall
Far Cry 3: Blood Dragon
Team Fortress 2
I was wondering if the community has experienced this or may know of a more permanent work around as I still haven't ruled out my system being the issue itself either.