Thanks for the replies. I don't think it is another window. It seems like it is the small window from VLC when I switch to full screen. It is a like a shadow window that VLC leaves behind when going to full screen. This only happens with VLC. I am now having to watch movies with Quicktime again. The...
This happened some time ago but after long time of searching I hope to now get the solution. Whenever I go to fullscreen on my second monitor there is a dark/shadow in the corner. The shadow takes up the bottom left corner of screen. It is not completely black but it is like a darker part to the scr...