Well that's one way of getting the garden shed repainted!
Followed the manual download route as advised above - 1hr 22 mins to complete. Installation 47 mins. Successful result, at least there appears to be no problems - yet.
Did SP2 really take this long? Can't remember if it did, it's been a while.
I wonder if Microsoft can dream up something else like this, I might just get round to painting the garden seat.