I have been trying to run sfc /scannow in cmd but have been unsuccessful. Therefore, after some research on the Internet, I turned to the following command:
DISM /Online /Cleanup-Image /RestoreHealth /source:WIM:X:\Sources\Install.wim:1 /LimitAccess
where X indicates the drive letter where the Windows .iso is mounted.
(I mounted the .iso file using Daemon Tools)
However, I keep getting the following message:
Error: 0x800f081f
The source file could not be found.
I'm not tech savvy, but after skimming over the dism.log, I found this line that may or may not have something to do with the error.
(p) CSI Payload Corrupt
amd64_microsoft-windows-microsoftedge_31bf3856ad364e35_10.0.10240.16397_none_19381f0c8accd5dd\MicrosoftEdgeSquare44x44.scale-125_contrast-white.png
I really do not wish to reset or refresh Windows because there are just so many programs I will have to reinstall. I would appreciate any help.
On a side note, Windows Update Diagnostic reports that the Windows Update service registration is missing or corrupt, which it failed to fix as well, if this means anything.
Best Answer
I've fixed this "Error: 0x800f081f" affecting a PC with Window 10 Pro-32 by running
Only the Windows 10 ISO downloaded from Techbench and mounted in E: with Daemon Tools worked. Other ISO downloaded with Windows 10 media-creation-tool did not work at all, returning the same error 0x800f081f, even when converted from the embedded ESD format to WIM, using NTlite, and mounted using either Daemon Tools or DISM GUI.
Also all other attempts to fix the error from Windows Update Live had not worked before, always returning same error 0x800f081f, i.e. by using:
Update 08/08/2016: As Techbench link above no longer works please give a try to the following link (note that I have not tested yet if it is the same kind of ISO which was formerly available from Techbench. Please report your results):
https://www.microsoft.com/en-us/software-download/windows10ISO/