Gave up and did a reset install. So all good now I have EaseUS software so will clone my Cdrive to a spare portable Drive I have for next time LOL

Thanks to all who tried to help I learnt a...

Thank You but have done all that in several of the suggested ways and no different

Was having problems with taskbar items and played around and fixed them but yesterday found that when I click on the start button nothing happens. Dont know how long its been like that as dont use...

I tried all the suggestions and what worked for me was to make the new Key and put the 29 string value in and nothing else.

That works so far