This is due to the "User Access Control" service in Vista, which will have adverse effects on many aspects of Aces High. The game auto-updater will not run, all the user folders are placed in a hidden path making it difficult to retrieve films, screenshots, squad art and so on.

For example, a good path might be "C:\Games\Aces High". This would allow you a good place to install all your games.

If you chose to allow the game to be installed in its default folder, then you will have to use the "Run as administrator" option in order for the game to be able to update itself. This will not correct the other problems with folders not being placed where we intended them to be placed.

If you understand the issues with Vista then proceed to download the game.