No Mouse Pointer

I'm attempting to play the demo of this game but my mouse doesn't show any pointer.
If I move the mouse about enough I eventually get a live spot on a button but it's impossible to play this way, any ideas please?

I also Am Attempting To Play this game But I have No Mouse pointer Showing!

I could play this fine on xp. Now that I am using Vista I have no mouse pointer in the game when on Full Screen. If I take it off full screen, the pointer will show. Just have to play on a small screen! I would like it to work on full screen though. Any Suggestions?