Whenever I am in a game of League of Legends and I try to Alt + Tab, Windows 8.1 generates extra programs that are not open, and if I accidentally select some of them, Windows 8.1 will open them. Here's what it looks like:
The "Other programs" besides Chrome and League of Legends are not open. They include "Search Pane", "Skype", and the rest of them have no name, or no action when you tab to them. This only happens when I'm in game, Alt + Tab functions correctly at all other times.