I'm curious if there's been any headway on resolving this issue as we're now heading into the start of live service. There was a rather lengthy thread in the Beta Tech Support forums about this but there was no word on any solutions yet.

To summarize the problem:
Players who have Vista as their current operating system are unable to run the game in Fullscreen mode because the mouse pointer becomes invisible.

This is an issue because there is a very significant framerate and performance loss if you run the game in borderless windowed mode. Some others I saw in the last thread were also reporting framerate drops when the mouse pointer moved at all. From what I saw when trying to search for a solution for this myself, was that it wasn't dependent on 32-bit or 64-bit systems, it was just running Vista. If there was a way to use a hardware mouse pointer, that might solve the problem.