When the System File Checker (sfc.exe) says it found integrity violations but couldn’t repair some system files, the next thing you should do is run the DISM tool with the /RestoreHealth option to fix component corruption. However, when running the following DISM command, error 0x800f081f may appear in some systems:

Error: 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 Configure a Windows Repair Source. This is the error i get, did everything i could. Important: Follow the below steps, exactly as mentioned: 1. Right click at Start menu and select Command Prompt (Admin). Type the following command and press Enter: DISM /Online /Cleanup-Image /StartComponentCleanup 3. When the operation is completed, give the following command (and press Enter. After that do the following: 1.Press Windows Key + X then select Command Prompt (Admin). 2.Type the following command into cmd and hit Enter after each one: DISM /Online /Cleanup-Image /RestoreHealth. 3.Wait for the DISM tool to repair the Windows image component store. 4.Now type sfc /scannow in.

How to FIX: DISM /RestoreHealth Could not Find Source Files to Repair Windows 10 or Windows 8/8.1. Clean and Analyze the WinSXS folder. Specify an alternative Repair Source in DISM by using the /Source switch. Specify an alternative Repair Source by using Policy. 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 http://go.microsoft.com/fwlink/?LinkId=243077.

Dism Error 0x800f081f Windows 10

To fix the error, you will need Windows Installer .ISO:

The Source Files Could Not Be Found Use The Source Option

Once you have mounted your Windows Installer .ISO, open up an elevated Command Prompt and depending upon whether you have

Dism.exe The Source Files Could Not Be Found

install.esd

The Source Files Could Not Be Found .net 3.5 Windows 10

or install.wim in the Sources folder of your Windows setup disk, run one of the following commands:
Or another command is:

And here's the raw output during my attempt:
I managed to repair DISM Error: 0x800f081f on a live Windows Server 2016 without a reboot is required, and I'm pretty sure this solution will work on Windows 10 too.
I hope this solution works for your issue as well. Let me know if you find this post useful by commenting down below -->

This topic describes common errors you can encounter when you use Features on Demand to enable or deploy .NET Framework 3.5, and recommended steps to resolve the issues.

Features on Demand Error Codes

Dism Log File Not Found

Error code	Name	Description	Resolution steps
0x800F081F	CBS_E_SOURCE_MISSING	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 about how to specify a source location, see Configure a Windows Repair Source.	Verify that the source specified has the necessary files. The source argument should point to the sourcessxs folder on the installation media or the Windows folder for a mounted image (for example, c:mountwindows for an image mounted to c:mount).
0x800F0906	CBS_E_DOWNLOAD_FAILURE	The source files could not be downloaded. Use the Source option to specify the location of the files that are required to restore the feature. For more information about how to specify a source location, see Configure a Windows Repair Source. Windows couldn’t connect to the Internet to download necessary files. Make sure that the system is connected to the Internet and click Retry.	Verify that the computer or server has connectivity to Windows Update, and that you are able to browse to https://update.microsoft.com. If WSUS is used to manage updates for this computer, verify that the Group Policy setting Contact Windows Update directly to download repair content instead of Windows Server Update Services (WSUS) is enabled.
0x800F0907	CBS_E_GROUPPOLICY_DISALLOWED	DISM failed. No operation was performed. For more information, review the log file at %WINDIR%logsDISMdism.log. Due to network policy settings, Windows couldn't connect to the Internet to download files required to complete the requested changes.	Contact your network administrator for assistance with the Specify settings for optional component installation and component repair Group Policy setting.

The Source Files Could Not Be Found. Use The Source Option To Specify The Location

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