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Thank you for your suggestions. There was no box to un-tick and right clicking the icon didn’t help. Buenchico’s link helped up to a point - MS Publisher is now working normally but MS Word didn't respond in the same way. It now asks if I want to 'allow the following program to make changes to this computer'. If I click Yes a normal Word page then opens. Problem now is that when I save a page to the desktop it does not re-open to display what I saved, so for the time being I'll prepare and save with Publisher. I'll get there in the end!