As of a few daze ago, I see the following problem.

When I open a new, or extant, workbook, the sheet(s) are not Arranged to fit
the Window.

I have to use the Window menu to Arrange as desired.

I had this same issue several years ago.

As a last resort, I'd use an AutoOpen macro, but my recollection is that
there was a Data key, or somthing like that, in the registry and I was able
to fix things by deleting that registry key.

I've used Windows.Arrange, but the settings do not stick when I save the
workbook.

Anyone know the trick?