How to fix Windows 10 Package KB3081438 failed to be changed to the Staged state. Status: 0x800f0816.

If you got error during Windows 10 (process download was stuck in something percentage), in Event Viewer (Win+X) > Windows Logs > Setup, you got

Package KB3081438 failed to be changed to the Staged state. Status: 0x800f0816, you need to restart Windows Update Service.

To fix that: Win+R and type services.msc, right click on Windows Update select restart.
You may check your update will continue, Windows button > Settings > Update & Security.