I have a flat screen Dell monitor hooked up to my laptop (from an old desktop) along with a 32" HDTV. I was under the impression my graphic card (nVidia Geforce 310M) could handle all three at once, but it won't, so I can only use two at a time. At first when I used the HDTV, sound went with it (TV speakers). When I disconnected, I had no sound on my laptop but Windows troubleshooter fixed that. A second use of the HDTV, as an expanded displa,y got no sound on the TV. I'm working on straightening out the conflict.
Perhaps since I use UltraMon
I don't see any type of Windows tool on the right hand side (do you mean in the tray area?) The ctrl+Windows+w also does nothing. Rather I have two commands to choose from (move window and maximize which spans two monitors) next to minimize on the top right of every window.