Saw that, Milo, thanks - I had to do that the last two times .net updates failed to register. A little drastic, I feel. See 'broken'?.
As you can see from post 1 I have been partway down the road, but the reason for trying to get help 'Help' from this tits-up organisation called M$ was to try and find WHY this was happening. Should one have to pay $46 to fix a broken product? Is there NO proper support for a purchase?