Avg error updating
You can use the Windows Update Troubleshooter with the steps mentioned above to fix this issue.
In the case that the steps don't fix Windows Update, you can try to install the Creators Update using the Media Creation Tool.
In addition, this guide features recommendations and solutions specific to the Windows 10 Creators Update.When trying to install new updates, an error message may prevent Windows Update from applying new updates successfully.The errors you'll receive may vary depending on the reason that caused them.The new version is slowly rolling out to more than 400 million qualifying devices around the world, and because it is a "feature update," you'll be getting a slew of new features and improvements.However, unlike those regular cumulative updates that you get every month, a new major update means a new set of problems.
You can quickly resolve this issue by restarting the upgrade process, but this time, after the Media Creation Tool completes downloading the installation files, make sure to disconnect your Wi-Fi or Ethernet connection to the internet.