You are running on Fullscreen on Windows Vista or greater.
Try going into the "config" folder in your AoT folder, then open the "client" folder. Now open up "prefs.cs" with Notepad. Look for a line that says something like: $Video::Fullscreen = 1;
Change the 1 to a 0, then save.
You can then play Age of Time flawlessly on your computer.