Now I am confused. I started looking into this, and Amazon claims they are not using HVM for windows instances, they are using a PVM driver. So in that case,

Now I am confused. I started looking into this, and Amazon claims they are not using HVM for windows instances, they are using a PVM driver. So in that case, running "windows" instances wouldn't help. But then, why are those freebsd amis intended for "windows" instances? Edit: nevermind, the PVM drivers they were talking about are just to speed up IO, windows instances do have to be HVM.