Microsoft-windows-netfx3-ondemand-package.cab -extra | RELIABLE · FIX |

If your computer is disconnected from the internet, or if Windows Update is blocked by corporate firewall policies, the standard "Turn Windows features on or off" method will fail.

: The file is usually named microsoft-windows-netfx3-ondemand-package~31bf3856ad364e35~amd64~~.cab for 64-bit systems.

Standard deployment uses (Deployment Imaging Service and Management Tool): Microsoft-windows-netfx3-ondemand-package.cab -Extra

In this context, the .cab file is the "Source" solution to the problem.

The tool is the command-line utility used to service Windows images. This is the primary and most effective method for installing .NET Framework 3.5 using the CAB file. If your computer is disconnected from the internet,

This package is part of Microsoft’s system. It contains the necessary files to enable .NET 3.5 without requiring a full internet connection to download data from Windows Update. It is frequently found in the \sources\sxs directory of a Windows installation ISO or DVD. How to Install Using the CAB File

Windows operating systems do not pre-install these files to save disk space. Instead, they are stored as "Features on Demand." The tool is the command-line utility used to

The first is the core package, while the latter includes language-specific resources for English (Great Britain). This is the "extra" file that users often ask about.

These errors indicate that DISM cannot find the source files or the .cab file is corrupted.