:idea: I had the same problem
It came down to using an unsupported screen resolution size. In the Video page there is the choice of Full Screen and Window. The Full Screen has a dropdown of supported resolutions and the Window version doesn't. the Window setup should take anything with a fixed aspect ratio but it doesn't seem to.
I used a resolution from the Full Screen dropdown and it worked.
[edit]
I just reinstalled Orbiter (in another location to do some dev work) and found that I also had to choose a different '3D Device' from the drop down box at the top of the page. I ended up using 'Direct3D T&L HAL (NIVIDIA GeForce GT 720)'
Don't be afraid to try different settings.
It came down to using an unsupported screen resolution size. In the Video page there is the choice of Full Screen and Window. The Full Screen has a dropdown of supported resolutions and the Window version doesn't. the Window setup should take anything with a fixed aspect ratio but it doesn't seem to.
I used a resolution from the Full Screen dropdown and it worked.
[edit]
I just reinstalled Orbiter (in another location to do some dev work) and found that I also had to choose a different '3D Device' from the drop down box at the top of the page. I ended up using 'Direct3D T&L HAL (NIVIDIA GeForce GT 720)'
Don't be afraid to try different settings.
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