I tried the sfc and dism fixes (they found nothing) and the start menu was still not working with a left click. Tried the long "Get-app...." process which I could not tell whether it was working or not after an hour so I stopped closed the command window. I decided to try the remove antivirus and re-install. I my case Zone Alarm Security Suite. That did the trick and after 24 hours I still (knock on wood) have a working left click start menu. The AV issue forced me to look into what is best AV so after my license on ZA runs out in 100 days I'm moving to Kaspesky AV. Don't think I need a firewall as I am connected to router and K has the best AV ratings.