I have a zoom problem that appears when I connect to an overhead projector.
If I bring up a blank worksheet, and click on any cell, Excell zooms to
about 400% all on its own! The zoom setting as well as many others are
disabled, renering Excel useless for my presentation.

I have a similar problem with Powerpoint.

I suspect a hidden setting somewhere. Any help is appreciated.

I swapped out Dell laptops hoping to correct the problem to no avail