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2017-11 Cumulative Update for Windows 10 Version 1709 (KB4048955)
2017-11 Cumulative Update for Windows 10 Version 1709 for amd64-based Systems (KB4048955) failed to install. I tried several times, uninstalling the update and allowing auto-update to try again, without success.
I then disabled Norton auto-protect and smart-firewall and tried again. This time installation was successful. I enabled auto-protect and smart-firewall after the update and things appear to be working still.