The file is a critical "Feature on Demand" (FOD) component used to install or enable .NET Framework 3.5 (which includes versions 2.0 and 3.0) on Windows systems .
While Microsoft pushes developers toward modern .NET versions, millions of businesses and power users still rely on .NET 3.5 (which includes .NET 2.0 and 3.0). The typical solution is to let Windows Update fetch the files. However, when you are offline, dealing with a corrupted system image, or simply want a , the best answer is the microsoft-windows-netfx3-on-demand-package.cab . microsoftwindowsnetfx3ondemandpackagecab extra free
In most cases, no restart is required. However, DISM may prompt a reboot if system files were locked. The file is a critical "Feature on Demand"
expand Microsoft-Windows-NetFx3-OnDemand-Package.cab -F:* C:\NetFx3Extracted when you are offline