What is Aero and where do I find it?

[timholt]

Thanks for the quick replies gents.
I selected the basic window as per Snakes suggestion but that gave me extremely bad tearing, so I have reset it to what it was.
There did seem to be a slight improvement with smoother panning with TIR in the cockpit, but to me that is a better option than tearing.
For info I don't have any Beta patches installed.

Edit: Mad Tommy, they are the first thing I tried - I had 4 but there was no improvement in the game.