Maradon

I am also running Vista Ultimate x64 SP1, and I had no trouble at all, even running everything under standard user privileges. So far Impulse is *much* more vista-friendly than Steam.

What do the asterisks and ǂ mean?

I experienced this same problem on Vista Ultimate, however if you follow the handy "find a solution" link that Vista offers you, it will blame the crash on video drivers. After updating to the latest video drivers from AMD, I have not crashed once.