Ahh yes - sorry I see what you mean by Windows Elements now.
YES - success in part. Having unchecked the box as you show, I can now zoom with the mouse wheel. Great.
When I press the mouse wheel though it scrolls between open applications rather than panning, so I need to get this sorted now. I tried shutting down AutoCAD and this 'scrolling between applications' still continues with other things I have open such as Word and Outlook etc. So its a generic setting that I need to change, not just one I can change within AutoCAD. Certainly the MBUTTONPAN command doesn't seem to do anything whether set to 0 or 1.
Getting there - many thanks.