I recently installed Windows 8, and yesterday I tried playing some games on it. The games were running smooth, but every time my mouse cursor ( in-game ) was anywhere near the top left or bottom left corner, and if I then clicked the mouse, then it's the same as clicking the windows-button. The Windows 8 overlay, or whatever it is, takes control of my monitor, and if I'm running Skype in the background, it gets temporarily muted. I can see now, when at desktop, that when moving the mouse to any corner causes some "HUD" to show up, buttons to click. I would like to disable this, as I just as easily can access this by using WIN, WIN+C and ALT+TAB. I don't know what the overlay-thing is called, so I didn't find anything when searching for it, just a bunch of touchpad-answer. This is simply when moving the cursor to any corner.
This has happened to me in ArmA2, DayZ and here in League of Legends: When the cursor hit the very top left or bottom left corner of my screen, then the cursor changes to the standard windows-cursor, and stays like that along the entire left side of the screen, which corresponds to how it acts if you try this at desktop.
The answer to how I can disable this has already been provided, I am now simply showing what's happening to me, as people are saying it shouldn't happen. If I left- or right-click when the cursor is the white arrow as on the right image above, then the fullscreen windows-app-thingy appears, and covers the entire screen on top of the game. Either the bottom or top click made the sound disappear as well(at least for skype, as far as I remember), can't remember which.
I am currently using dual monitors, and I'm thinking that can have something to do with it. The second monitor is to the left of my primary, as you can see on the image, which leads me to believe there's something going on there. The çursor is changing on the edge to the other monitor, but the fullscreen game/application won't allow the cursor to enter the second monitor. Could this be a general bug affecting all dual monitor-users?