When I am running programs, I run into a problem with scrolling. I notice the issue mostly in Microsoft word, but it appears to be happening to a smaller degree in other applications. The problem is that when I scroll, the scrolling which occurs is delayed, and when I change directions the scrolling doesn't change directions but continues in the last direction I scrolled. The only way to prevent it from scrolling in the wrong direction is to completely remove my finger(s) from my mouse/trackpad (I have a mac book pro and a magic mouse which the problem occurs on). I am also using parallels 9 (the problem didn't occur with parallels 8). What would cause this problem and what can I do to solve the problem?