When I am typing in MS word after some time, the text i am typing moves to the top of the screen. The remainder of the document stays in place. If I minimize then restore the word window, the display is fine again.
I mention MS word only because the issue is most annoying there. I do believe (but not positive) that I have seen this using other applications.
I have run detect and repair for MS office and have reinstalled new video drivers provided by Dell (the computer is a Dell)