Describes the cause and action for error messages.
failed to upgrade from windows 7
Here's What You Can Do if Windows 10 Upgrade Fails - groovyPost
Resolve Windows 10 upgrade errors - Windows IT Pro | Microsoft Docs
Windows 7 - how to remove failed Windows 10 upgrade from Windows ...
Unable to upgrade to Windows 10 from Windows 8.1/7
Windows Cumulative Update not installing or fails to install
In-place upgrade to Windows 10 Updates - Endpoint Encryption