Failure to install Windows 10 update to 1709 from 1703

Failure to install Windows 10 update to 1709

First step try resting Windows Update components.

How do I reset Windows Update components?

https://support.microsoft.com/en-sg/kb/971058

Then carry out a clean up in PowerShell (make sure you run as admin)

DISM.exe /Online /Cleanup-Image /RestoreHealth /Source:C:\RepairSource\Windows /LimitAccess

rescan

sfc /scannow

Then run Windows update again.

If the above fails you can try the Windows Update Assistant

Windows 10 Update – https://www.microsoft.com/en-us/software-download/windows10