He has taken me as far as he can - and now says
'Hi, alas I have been unable to find a solution or duplicate the problem on my system. What I would recommend is that you post in the browser forum where the technical experts are. They know a lot more than I do. Reference this thread and let them know you are free of malware '
I have followed all his recommendations to reset/clean etc.
Quick summary - Any browser, any Search Engine - click on Image Search - as often as not, get a page full of white squares only, and after a lengthy delay. Sometimes, for no apparent reason, get some images - occasionally get full screenful. Similarly, Map search is slow, and almost always tells me 'No data available - zoom out' even when zoomed right out (and i know there is data, I have seen it in the past - like my own house) Sometimes shows a patchwork - some squares with images, some with the 'No data' message.