Is there a trick to making this game actually work in Windows 7? I have it via Steam. It loaded and played in the initial stages, where you walk around the deck of the ship. But upon first mission starting, it crashes on loading, with the message: "Mass Effect has Stopped Working".

Trying to resume mission upon restart has the same effect.

Any idea why this might be? All my other games/etc work fine.

Windows 7 64.