Windows 10 DISM error: 0x800f081f
I've fixed this "Error: 0x800f081f" affecting a PC with Window 10 Pro-32 by running
DISM /Online /Cleanup-Image /RestoreHealth /source:WIM:E:\sources\Install.wim:1 /LimitAccess
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:
DISM /Online /Cleanup-Image /RestoreHealth
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/
I've fixed the same problem by running DISM /Online /Cleanup-Image /RestoreHealth /source:WIM:C:\Users\User\Downloads\Install.wim:1 /LimitAccess against an updated Install.wim with the latest Windows 10 Cumulative Update slipstreamed (KB3081452 and KB3095020 at the time of this post). There's no need to repackage an .ISO.
Basically, I followed the "Add updates to customized Windows" guide from Microsoft itself:
md C:\mount\Windows
Dism /Mount-Image /ImageFile:"C:\Images\install.wim" /Index:1 /MountDir:C:\mount\Windows
Dism /Add-Package /Image:C:\mount\Windows /PackagePath:C:\MSU\Windows10-KBxxxxxxx-x64.msu /LogPath:AddPackage.log
Dism /Unmount-Image /MountDir:C:\mount\Windows /Commit
Those who don't have a copy of the original un-encrypted Install.wim file may find this and this helpful.
Updated, I did another in-place upgrade on two other household PCs, Windows 8.1 -> Windows 10 x64, using the Media Creation Tool and the "Keep nothing" option. After installing all updates (including the latest cumulative update KB3093266), both PC failed the "sfc /scannow" test and the "dism /Online /Cleanup-Image /RestoreHealth" recovery, same error 0x800f081f.
So, I repeated the procedure described above, this time using a Windows 10 ISO from TechBench and slipstreaming the KB3093266 MSU into its install.wim. Problem fixed.
Updated, the issue re-surfaced after upgrading to Windows 10 Version 10.0.10586.0 (November 2015 Update + latest cumulative update). This time, I simply downloaded the latest ISO from TechBench, mounted it and executed DISM /Online /Cleanup-Image /RestoreHealth /source:WIM:E:\Sources\Install.wim:1 /LimitAccess, then sfc /scannow. Apparently, there's no need to slipstream the latest cumulative update.
Updated, the issue re-surfaced once again on a different PC. This time I coudn't find the ISO (has TechBench gone?), so I had to use the Media Creation Tool, create a USB drive installation, then convert install.esd into install.wim:
dism /export-image /SourceImageFile:d:\sources\install.esd /SourceIndex:1 /DestinationImageFile:c:\temp\install.wim /Compress:fast
Then repair the image using Windows Update as backup (i.e., without /LimitAccess):
dism /Online /Cleanup-Image /RestoreHealth /source:WIM:C:\temp\install.wim:1.
Then repair the system files:
sfc /scannow.
Don't use the parameter /source:WIM:X:\Sources\Install.wim:1 /LimitAccess. Windows 10 has version 10.0.10240.16384 and the corrupted file has version 10.0.10240.16397. So the file is not part of the Install.wim. Without the /source parameter DISM will download the corrupted files from WindowsUpdate and replace them.