The file microsoft-windows-netfx3-ondemand-package.cab is a Windows package used to install .NET Framework 3.5 (which includes versions 2.0 and 3.0) on Windows 10, Windows 11, and Windows Server. While modern versions of Windows come with .NET Framework 4.x pre-installed, many legacy applications still require the older 3.5 runtime to function.
Create a DWORD: DisableComponentStore set to 1 . Microsoft-windows-netfx3-ondemand-package.cab -Extra
This package is part of the "Features on Demand" (FOD) set for Windows. While older Windows versions allowed enabling it directly via the Control Panel, newer builds may require this specific .cab file from the original installation media. Where to find microsoft-windows-netfx3-ondemand-package.cab Where to find microsoft-windows-netfx3-ondemand-package
This CAB file is the core component needed to enable legacy application support in modern Windows environments (Windows 10, 11, and Windows Server). and Windows Server).