Thanks for the info I had to go the long way round as I have a Office 365 subscription I first had to remove Office 2016 then install Office 2013 still did'nt work so tried your wonderful suggestion but oddly had no error messages on any other files and now hey presto were back up and running.
Well don MS for another wonderful yet inept upgrade destroying your own products I've had issues with MS Money Office and a few others but I'm getting there.
Again many thanks for your help.