I've noticed over the past few weeks if I am using my MacBook Air for over an hour, and especially if I'm using Parallels my Trackpad freezes. I move my finger around and the pointer just stays in its place, then it jumps to where I moved to and freezes again. The only thing that seems to "fix" this is to power the MacBook Air off and leave it for at least 10 minutes. If I start up immediately the trackpad still gets stuck when moving around. Any ideas? Thanks in advance.