Microsoft-windows-netfx3-ondemand-package.cab -extra -

If you have the CAB file saved in a specific folder (e.g., C:\Features ), use: Where to find microsoft-windows-netfx3-ondemand-package.cab

# Method 1: DISM with local source dism /online /add-package /packagepath:"C:\temp\Microsoft-windows-netfx3-ondemand-package.cab" /norestart Microsoft-windows-netfx3-ondemand-package.cab -Extra

If your legacy app requires more than just the runtime (e.g., IIS hosting for ASP.NET 3.5), you need the satellite packages. These are often incorrectly called “-Extra”. If you have the CAB file saved in a specific folder (e