Always Stops Adjusting Scenery Objects on 80%

Hi, I bought FSX a few months ago and just decided to start playing recently. When playing in free flight (that's all I've tried), no matter what airport I choose, it stops loading on 80% 'Adjusting Scenery Objects'. It doesn't advance past that, and I can't even close the window/game (meaning I have to restart my computer to try again). I have no mods, I've tried verifying the game cache, doing a clean install, and several different airports and planes. I'd like to play the game, can anyone help?