: These usually mean Windows cannot find the source file. Double-check that the path points exactly to the folder containing the Version Mismatch : Ensure the
".NET Framework 3.5 backwards compatibility shim"
is the specialized cabinet (CAB) file containing the installation files required to enable .NET Framework 3.5 (which includes .NET 2.0 and 3.0) on modern Windows operating systems.
You can install .NET 3.5 using this .cab file in two primary ways, both using the DISM command. It is crucial to run your command prompt as an administrator for either method to work. Microsoft-windows-netfx3-ondemand-package.cab -Extra
Then manually copy the extracted CAB contents to: C:\Windows\WinSxS\
echo Installing .NET 3.5 base... DISM /Online /Add-Package /PackagePath:"%CAB_PATH%" /NoRestart /Quiet
The most common way to use this file is to install the .NET Framework 3.5 feature when your computer is offline or when Windows Update isn't working. The primary tool for this task is the tool. Here are the two most reliable approaches. : These usually mean Windows cannot find the source file
To install .NET Framework 3.5 offline using the .cab package, you must use an elevated command interface with administrative privileges. Method 1: Deployment Image Servicing and Management (DISM)
The filename Microsoft-windows-netfx3-ondemand-package.cab might look complex, but each part reveals a clue about its purpose:
If standard package addition fails, extract an official Windows ISO to drive D: and point directly to the Side-by-Side ( sxs ) repository folder using this command: It is crucial to run your command prompt
DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /LimitAccess /Source:D:\sources\sxs
This method is best if you have already downloaded or extracted the Microsoft-Windows-NetFx3-OnDemand-Package.cab file and saved it to a known location, like C:\temp .
dism /online /add-package /packagepath:"D:\sources\sxs\microsoft-windows-netfx3-ondemand-package.cab"
Complete Guide to Microsoft-Windows-NetFx3-OnDemand-Package.cab
