spent 3 days trying to sort this out and have got nowwhere, have tried various fixes found on forums sorting dism out installing, cleaning up windowws updates etc, making system reserved bigger etc no luck, i'm so fed up now i am disabling windows updates as i can not wait 20mins for shutdown while it installs the update, and 20mins for boot up while it undoes the changes.
no error messages in event logs etc.
yet another microsoft screw up, while installing updates, so glad we have not rolled out Win8.1 to the organisation.