download microsoft-windows-netfx3-ondemand-package.cab is a file associated with the .NET Framework 3.5, a software framework developed by Microsoft. This particular file is a component on-demand package file for the .NET Framework 3.5.
If you have the .cab file (or the installation media), use the tool to install it without an internet connection. Download Microsoft-windows-netfx3-ondemand-package.cab
Type the following command exactly (note the spaces and colons): download microsoft-windows-netfx3-ondemand-package