To let you know the current status.
I ran 'Recovery' & it went very well. I then ran all window updates (+250) which took some time as you can imagine. Interestingly, during last evening there were a further 5 updates & upon completion the 'bloody' mouse worked!!
The next day, however, the mouse failed again. I moved the mouse to another port & it worked again!! I know this a standard recommendation but I tried this previously w/o any joy.
Ain't life interesting???
Tomorrows challenge is to get OH iPad to work after an IOS 8 update. Apparently, there is a further update to fix the issues but I aint seen it yet. Seeing a local Guru tomorrow who may be able to sort it. Will report back - if you are interested of course?