I solved it thanks. Although Vista installed the correct VGA driver for my card, I installed the one on the Acer (my laptop) drivers page. This fixed the problem.
I have just installed Vista Home Premium on my laptop. This laptop previous had Vista on it but I have re-installed it. The first installation ran fine but this time whenever I move the mouse around it gets stuck occassionally for a second. It is very annoying. It is not the mouse itself as it...