Cannot install/update .net 3.5 for Windows 10 - Microsoft Q&A
This guide provides instructions on how to download and install the file.
You need the official Windows installation media (ISO file) that matches your current OS version (e.g., Windows 10 22H2, Windows 11 23H2/24H2). Microsoft-windows-netfx3-ondemand-package.cab Download
Type the following command (replace the path with your actual file location):\textdism.exe /online /add-package /packagepath:"C:\temp\microsoft-windows-netfx3-ondemand-package.cab" Press . Wait for the progress bar to reach 100%. Method 2: Using the Windows ISO (Recommended)
If downloaded from Microsoft, it is a false positive. Some aggressive antivirus software marks CAB files as suspicious because they contain executable code. Upload the file to VirusTotal; legitimate ones will have zero detections from major vendors. Cannot install/update
Download the official Windows Media Creation Tool or a Windows ISO directly from Microsoft.
Let's break down what this command does: Wait for the progress bar to reach 100%
While new Windows features come and go, the demand for .NET Framework 3.5 persists, driven by countless older yet critical applications. When the standard online installation fails, downloading and using the Microsoft-windows-netfx3-ondemand-package.cab file with the DISM tool provides a powerful and dependable solution.
You typed the wrong file name or extension. Windows hides known extensions by default. Solution: Open File Explorer, go to View > Show > File name extensions . Verify your file is actually .cab , not .cab.zip or .cab (1) .
Systems that cannot access Windows Update for features.