Sometimes, DISM refuses to work due to a corrupted servicing stack. In these deep-corruption cases, you must go "Extra" – manually extract the CAB and place files.
Once you have located the file—either by extracting it from an ISO or downloading a standalone version from a trusted repository—you can install it using the DISM command. This is a powerful administrative tool, so proceed with care.
Set it to and check the box for Download repair content and optional features directly from Windows Update instead of Windows Server Update Services (WSUS) .
The package is typically found on Windows installation media (ISO) within the \sources\sxs\ folder. You can install it using the Deployment Image Servicing and Management (DISM) Installation Steps: Locate the file : Ensure you have the microsoft-windows-netfx3-ondemand-package.cab file available (e.g., on a USB drive or a mounted ISO). Open Command Prompt : Right-click the Start button and select Command Prompt (Admin) Windows Terminal (Admin) Run the DISM Command : Execute the following command, replacing D:\sources\sxs with the actual path to your file: Microsoft-windows-netfx3-ondemand-package.cab -Extra
@echo off set CAB_PATH=D:\sources\sxs\Microsoft-Windows-NetFx3-OnDemand-Package.cab set EXTRA_LANG=%~dp0NetFx3-LP.cab
DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /LimitAccess /Source:D:\sources\sxs
This error indicates that the requested feature is on the system, but the source files are missing or the installation process is being blocked. It is often encountered when using the graphical interface. Sometimes, DISM refuses to work due to a
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dism /online /enable-feature /featurename:NetFX3 /all /source:D:\sources\sxs /LimitAccess Tells Windows exactly where the "extra" package is located. /LimitAccess: The crucial "extra" flag that tells Windows
Even with the correct .cab file, users may encounter issues: This is a powerful administrative tool, so proceed with care
(Replace E:\ with your mounted ISO drive letter or extracted folder path.)
Elias opened the Command Prompt with Administrative rights. He didn't just need the file; he needed the Deployment Image Servicing and Management (DISM) tool to force the operating system to accept it.
There are two primary methods to obtain the required CAB file:
".NET Framework 3.5 backwards compatibility shim"
For users who do not want to download an entire multi-gigabyte ISO, the standalone CAB file can often be found on trusted technical forums or community repositories, extracted directly from the Windows update servers. If you download such a file, ensure it is from a source you trust and is intended for your specific Windows architecture (32-bit or 64-bit) and version.