Thanks for your reply. Yes, the list does show Office 2007 as being installed and I can select it and choose it before selecting Uninstall - but this does nothing.
Office 2007 was working OK.
I installed Office 365 as a trial to see if I wanted it before buying. I was informed by a Microsoft operative that it could be installed alongside 2007 as they use a different install process. However this was not the case as there were file association problems in Word. Other programs seemed to be OK. So I tried to uninstall Office 2007 which is where the problems arose.
I have managed to get Office 365 fully working, but Office 2007 is still lying around.
I suspect as you say, that Office 2007 has somehow got tied into Office 365.
I am sure this could be fixed somehow, but if it is a choice between doing a complete Windows 10 fresh install or leaving Office 2007 lying dormant, I'll choose the latter option, unless I come across problems in the near future.
Perhaps this will precipitate a move to Windows 11 on a new computer which I was hoping to put off for a year or two!