Download ((new)) Microsoft-windows-netfx3-ondemand-package.cab -

When you attempt to run an older application, Windows usually triggers a prompt stating that you need .NET Framework 3.5. If you click "Download and install this feature," the system relies on Windows Update.

Dism /online /enable-feature /featurename:NetFX3 /All /Source:D:\sources\sxs /LimitAccess Use code with caution.

Mount your Windows installation ISO (e.g., to drive D: ).

This is the most stable and Microsoft-recommended approach. Download Microsoft-windows-netfx3-ondemand-package.cab

At this point, the search for a solution leads you to a specific file: . This guide will explain exactly what this file is, why you need it, how to download it safely, and the step-by-step process to install it—even on offline machines.

To get the correct version for your system, you must extract it from a Windows ISO that matches your current OS build.

Do not trust untrusted download sites. Always extract from an official Microsoft ISO or generate via UUP Dump. Your system security depends on it. When you attempt to run an older application,

Cannot install/update .net 3.5 for Windows 10 - Microsoft Q&A

He right-clicked the .cab file on the USB drive and selected Delete .

Elias slammed his fist on the desk. "You have got to be kidding me." Mount your Windows installation ISO (e

The safest and most reliable method is to extract the file directly from your own Windows installation media:

dism /online /add-package /packagepath:"C:\Microsoft-Windows-NetFx3-OnDemand-Package.cab" Use code with caution.

by right-clicking the file and selecting Mount .