Paddy
Thank you for pointing me in the right direction. It was late last night and when uninstalling nautilus and tracker also uninstalled ubuntu-desktop So had to reinstall it all. I've done (your) Step 2 and so far so good.
As for tracker. I assume it performs some useful function, but perhaps a case of the tail wagging the dog. When I could get to see/run System Monitor I see/saw that it pretty well gobbles up all available memory making it impossible to do anything else. Perhaps if there was some way to limit its resource usage it would be more useful.
Once again, thank you
Angus
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