Oh my God! It took 8 hours and 43 minutes. Start date and time: October 19, 2013 12:25 End date and time: October 19, 2013 21:08 Please refer to here for how to update from “Windows 8.1” to the latest version “Windows 8.1 Update (KB2919355)”.

Can’t update to Windows 8.1 - no update found in store