Microsoft DISM Docs
0x800f081f - The source files could not be found.
|Use the "Source" option to specify the location of the files that
are required to restore the feature. For more information on
specifying a source location, see
|Run from elevated cmd box: DISM /Online /Cleanup-Image /StartComponentCleanup|
|Run from elevated cmd box: DISM /Online /Cleanup-Image
You can use Group Policy to specify a Windows image repair source to use
within your network. The repair source can be used to restore Windows
features or to repair a corrupted Windows image.
Features on demand enables you to remove an optional feature from a Windows®
image and then restore it later. You can disable optional features and
remove files associated with those features from a Windows image using the
Deployment Image Servicing and Management (DISM) tools. When you use the
/Remove argument with the DISM /Disable-Feature option, the manifest files
for the feature or Server role is maintained in the image. However, all
other files for the feature are removed. This enables you to store,
download, and deploy smaller images without losing features. Once the image
has been deployed, users can enable the feature on their computers at any
time by using features on demand to retrieve the required files from the
repair source. For more information, see Enable or Disable Windows Features
Automatic corruption repair provides files to repair Windows if the
operating system has become corrupted. Users can also use a specified repair
source on your network or use Windows Update to retrieve the source files
that are required to enable a feature or to repair a Windows image. For more
information, see Repair a Windows Image.
Choose a Repair Source
You can use Windows Update to provide the files
that are required to restore a Windows feature or repair a corrupted
operating system. You can also configure Group Policy
to gather the required files from a network location. Multiple source
locations can be specified in the Group Policy.
Use Windows Update to restore optional features and repair Windows images
Windows Update will be used by default if it is allowed by the policy
settings on the computer.
If you want to use Windows Update as a primary or backup source for files
that are used to restore optional features or repair Windows images, you
should make sure that your firewall is configured to
allow access to Windows Update.
Use a network location to restore optional features and repair Windows
You can use a mounted Windows image from a WIM file as a source to restore
optional features and repair a corrupted operating system. For example,
c:\test\mount\Windows. For more information about capturing a Windows image
as a WIM file, see Capture Images of Hard Disk Partitions Using DISM.
Mounting a WIM image
If you need to make change to a WIM file, you will need to mount it
properly on Windows using DISM, a command line that enumerates, installs,
uninstalls, configures, and updates features and packages in Windows images.
Open an elevated command prompt window, and run the following command:
|DISM /Mount-Wim /WimFile:"filename.wim" /index:1 /MountDir:"c:\temp"|
Make sure the mounted directory is empty and has nothing in it, as the
image will be mounted to that folder that you can browse through with File
You can use a running Windows installation as a
source to restore optional features by sharing the
c:\Windows folder on your network.
You can use a Windows side-by-side folder from a network share or from a
removable media, such as the Windows DVD, as the source of the files. For
You can use a Windows image (.wim) file on a network share as a source to
restore optional features. You must specify the index of the Windows image
in the .wim file that you want to use and you must use a Wim: prefix in the
path to identify this file format. For example, to specify index 3 in a file
named contoso.wim, type: Wim:\\network\images\contoso.wim:3.
When specifying a source, only use RTM media regardless of whether the
source is a WIM or a mounted Windows image. Refresh media has older file
versions excluded from the media and the target operating system may need
these files. Also, make sure the source is patched to the latest Cumulative
Update. If the target OS is patched to a higher level than the source,
adding features or repairing Operating Systems may fail because the target
OS needs updated files that are not present in the source.
Set Group Policy
You can use Group Policy to specify when to use Windows Update, or a network
location as a repair source for features on demand and automatic corruption
Configure Group Policy for Feature on Demand
Open the group policy editor. For example, on a computer that is running
Windows 10, from the Start screen, type Edit Group Policy, and then select
Edit Group Policy to open the Group Policy Editor.
Click Computer Configuration, click Administrative Templates, click System,
and then double-click the Specify settings for optional component
installation and component repair setting.
Select the settings that you want to use for Features on Demand.
Maintaining a Repair Source
If you do not use Windows Update as the repair source for features on demand
and automatic corruption repair, you should consider the following
guidelines for maintaining a repair source.
You should keep any repair source current with the latest servicing updates.
If you are using an image from a WIM file for features on demand, you can
use the DISM tool to service the image. For more information, see Mount and
Modify a Windows Image Using DISM. If you are using an online Windows
installation shared on your local network as a repair image, you should make
sure that the computer has access to Windows Update.
You must include all of the relevant language packs with your repair source
files for the locales that your image supports. If you try to restore a
feature without all of the localization components that the Windows
installation requires for that feature, the installation will fail.
You can install additional language packs after a feature is restored.
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