I used Camtasia recorder on Windows 8.1 and everything was OK. Now I've just upgraded to Windows 10 and tried to record. When I use 1280x720 resolution, everything looks OK in the first few seconds; then I got black border over the top of my screen. First I got two black shadows on the left and right part of screen and after than immediately complete black border. I have to make shoot in this resolution. What is the solution of this problem. I spent a lot of hours to prepare raw material and I have a very short due date to make video and I don't know what to do.