It must be trying to install the latest feature update. I recommend you try doing so offline manually:
Please be advised some users are reporting issues with the Windows 10 1709 update. Make sure you backup before attempting to upgrade:
http://answers.microsoft.com/en-us/windows/wiki...
How to block it if you don't want to upgrade:
https://www.groovypost.com/howto/block-windows-...
What is the make and model of your computer?
Have you checked the manufacturers website to determine compatibility?
Check this List to Determine if Your Computer is Compatible with the Windows 10 Fall Creators Update 1709
https://answers.microsoft.com/en-us/windows/wik...
perform the following tasks:
12 Things You Should Do Before Installing Windows 10 Creators Update (Version 1709)
[https://www.groovypost.com/howto/prepare-comput...](https://www.groovypost.com/howto/prepare-computer-windows-10-creators-update-version-1703/)
How to download official Windows 10 ISO files
[http://answers.microsoft.com/en-us/windows/wiki...](http://answers.microsoft.com/en-us/windows/wiki/windows_10-windows_install/how-to-download-official-windows-10-iso-files/35cde7ec-5b6f-481c-a02d-dadf465df326)
How to Upgrade to Windows 10 Creators Update version 1709 using ISO File from Versions 1507, 1511, 1607 and 1703
[https://answers.microsoft.com/en-us/windows/wik...](https://answers.microsoft.com/en-us/windows/wiki/windows_10-windows_install/how-to-upgrade-to-windows-10-creators-update/617a37da-8fc0-4f33-a3eb-59fe9082f925)