Windows 10 Update Error 0x80073712

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I noticed I haven't received any win10 updates for a while so I went to Settings -> Update & Security -> Windows Update.

When it goes to check for updates, it tells me I have "Cumulative Update for Windows 10 Version 1511 for x64-based Systems (KB3198586)" available. It get's to "Downloading updates 0%", hangs for a while & gives me the above error code (0x80073712).

Googling this took me here.

Unfortunately sfc /scannow only tells me:

C:\Windows\system32>sfc /scannow

Beginning system scan.  This process will take some time.

Beginning verification phase of system scan.
Verification 100% complete.

Windows Resource Protection found corrupt files but was unable to fix some
of them. Details are included in the CBS.Log windir\Logs\CBS\CBS.log. For
example C:\Windows\Logs\CBS\CBS.log. Note that logging is currently not
supported in offline servicing scenarios.

running DSIM tool tells me it can't ever find the source files. Any advice?

 

[gimp]

For one, you could try
dism /online /cleanup-image /restorehealth /source:source\install.wim (or wherever the WIM might exist)

Could also try stopping Windows Update service, deleting the C:\Windows\SoftwareDistribution folder, restart Windows Update service, then try again.