On my laptop, the cursor is fine. When I use my desktop (which I prefer) running Vista Ultimate 32-bit, the cursor floats, and, if you try to go from point A to point B, it overshoots B and is hard to point directly at B. Is there an option or adjustment to correct this?

Sounds like mouse acceleration, which is an out-of-game issue. I'm not sure exactly where acceleration settings are located in windows.

But there is no problem outside the game. It only happens in the game.

Thanks for your reply.

Try switching vsync mode in Options->Video