Ursprünglicher Beitrag von: Joseph Eckstein ,
One of the most simple possible explanations for this is that when you are typing on the keyboard, your palms are accidentally touching the trackpad. You may have a different typing style than your wife, thus causing this to only happen on your unit. An external keyboard may help solve this issue. This will allow you to separate the keyboard that you are typing on from the trackpad. Try typing an email on your wife's computer and see if you can reproduce the issue.