I'm on Windows 10 Pro, the November Update, Version 1511, (OS Build 10586.3).
I was getting the that error, and error"0x800f081f the source file could not be found..." if I tried to do it offline,
over and over again, trying to run "sfc /scannow" and "dism......" commands. I was trying to use the iso I downloaded directly from the Microsoft Upgrade link via the MediaCreationToolx64. No go, time after time, over the span of a couple days.
I finally downloaded the 1511 iso from TechBench. I "mounted" the image and ran the following:
"Dism /Online /Cleanup-Image /RestoreHealth /Source:wim:H:\sources\install.wim:1 /limitaccess"
(I think "LimitAccess" prevents DISM from going online to Windows Update to download the files.)
Anyway, after downloading and "mounting" the TechBench ".wim" version, everything completed successfully and the component store, etc, was cleaned up nicely. Rebooted and ran "sfc /scannow" again. No integrity errors found.
Don't know why the download via Microsoft Upgade wouldn't work. I even tried using "install.esd" in place of .wim. It wouldn't work either. Only the TechBench download worked. I suspect there is some kind of corruption in the Microsoft Upgrade direct iso
In any event, Happy Camper now!
Hope this helps someone.