I upgraded from version 9 to 10 a week ago. The video and audio both played when first installed about two weeks ago. Now when I click to start the video (IE: Quick Start training video) Thee sound starts but the video goes black. I have gone through all the steps in the troubleshooting help page titled TROUBLESHOOTING MEDIA PROBLEMS. Nothing has solved this issue, including reinstalling Logos. All other media files on my system work. There have been no OS software upgrades or other programs installed. Has anyone else experienced this and found a solution?