The only solution now is a refresh/rebuild. There's no other automated fix. The servicing stack is screwed up and can't get this update installed.
I'm sorry that I don't have any better solution.
Hi Susan, Thankyou for your prompt and honest reply.
Once i've finished backing everything up i'm going to give a refresh a go. I'll let you know how i do.
Any solution, even if it's difficult to swallow, is still a solution.