When I open any, Excel file on my system, that is unprotected,
and that is most of them, all the cells show a small red corner
and when you click on it, it has a drop down with some error
checking things.

This just came on in the past couple of weeks that I have been
working out issues on othe workbooks, and I think there was
something, that I tried that has caused this.

Does anyone have any ideas on how I can make this go away?

Thanks,

Jeff W.