Hi Macropod,

Thanks for helping me troubleshoot this.

I am using an external keyboard, so I'm not sure how the trackpad could come into play, but I have disabled the trackpad now and will see if it makes a difference for the deletion issue.

It is still periodically doing the horizontal scroll "jump to the right" as I work though, pushing the part of the text on the left outside the visible window. Could you clarify more what you mean about the application window being too big for the screen? i am not using Word in full screen. It is just taking up a small portion of my screen (centered in the middle).
Could this be related to the 1080p screen somehow?