I know this is not going to be helpful, but I think everyone has the same problem you stated in the beginning. The update comes out and if we have our Xbox Ones set to download updates automatically, it will download them to 98% and then stop and make us do the last 2% when we get on. This is what has happened to me on both COD updates. I didn't have mine lock up like yours, but my controller did mess up yesterday after the update. About 30 seconds after the update finished, it was as if I was holding right on the d pad and not letting go. Everywhere I went on my Xbox Home, it would just instantly scroll to the right and not stop. I had to power off my console and take the batteries out of the controller to fix it. Could just have been a glitch with the controller or it could have been the update, I don't know.