Terry Pinnell wrote:

I'm the sole user of this PC and so don't want to get messages like
these.
https://dl.dropboxusercontent.com/u/...edMessages.jpg

Can anyone spell out the steps I need to take in Excel 365 to prevent
them please. Must admit I found the F1 Help hard to follow.

OK, found out how to customise the first of those via
'File/Options/Trust Centre/Trust Centre Settings'.

And for the time being the second has not re-occurred.

--
Terry, East Grinstead, UK