I woke the machine up and let it finish what it was doing, some sort of "upgrade" (why do they call it an upgrade when they invariably downgrade the performance?). It is now able to do some of what I ask but it still isn't working as fast as it used to do. If I play 'toob videos they frequently pause to buffer the data, much more than my Android tablet does when used in the same location (favourite chair, same wifi connection etc). I just checked the settings, it is set to not install anything automatically but that hasn't stopped it! If it gets any slower, installs anything else unwanted or otherwise annoys I'll wipe windoze from it and install linux.
Rans6......