Thanks for the advice Guys....
I am sticking with it.
Just seen databridge jump from half way to virtually 95% installed.
I am just leaving it to get on with it..... as YellowCircleWeb suggests.... it seems to be working.
But taking an extraordinary amount of time.
UPDATE: DataBridge Installed but took a good 2 hours.....
So the moral of the tale for now is chill out and let it do its thing.