There is definitely software made for one version of Windows that won't run on another, regardless of bit count. Not a lot of it, but it's there. In my experie

There is definitely software made for one version of Windows that won't run on another, regardless of bit count. Not a lot of it, but it's there. In my experience, industrial software is often pretty poorly designed, so it wouldn't surprise me if it's more common in a hospital environment.