In fact, I don't think I even have a "Display" box. I looked at the step by step tutorial but whenever I right click there is not "display" box. I'm using a Windows 8 laptop. And the problem started a few days ago. Every video I play is green screen. I thought it was just on youtube but I went to other websites and it's the same problem. How can I fix this? Please help, thank you!
"Green" stuff usually indicates a conflict with the graphics drivers, but I would think that that Windows 8 would have the latest drivers already installed.
What is your display adapter, device driver & date? See http://forums.adobe.com/thread/945765