A search for the error on the internet suggested a problem with a dll and took me to site which suggested I download a system / registry cleaner which it tried to sell to me in an unethical or at least annoying way. Is MS really associated with these dodgy outfits which claim be 'Windows partners' and part of the MS Help service? Anyway, I used three registry cleaners I already had, not expecting any benefit --- and I got what I expected!
What should I do to eliminate the problem?
(I did not select Bold above but every time I clicked Enter the font size increased significantly. Bold seems to be the lesser of the irritants).