Hello, I am a first time user of apple laptops. I have noticed that when I want to scroll up or down the page or even putting a cursor into a search box it pauses a lot and scroll wheel appears all the time. Also while typing an email or even typing in this forum the appearance of alphabets lag behind and again a wheel keeps appearing with pauses. The browsing is not as smooth as it was with windows. This is very annoying. I have tried system preference but failed. Please help me. Many thanks.