How long has it been stuck like that? When I last updated mine it took a while and was on the spinning gears for ages before it finally finished. Give it a while and it should be OK
Absolutely right!!! Did that with 1308 update, after 3 days it was hello 3rd Lumia 920. I have to pass on these updates, I don't have a working backup device in the event 1314 takes out my 3rd Lumia 920 lmao.