:If you have the .cab file or the entire sxs folder copied to C:\NetFx3 , run this command in an Elevated Command Prompt :
You can also point to the folder containing the CAB:
This only installs .NET 3.5 (and 2.0/3.0). .NET 4.5+ is a separate feature.
The NetFX3 feature includes both .NET Framework 2.0 and 3.5. In Server 2012 R2, Microsoft introduced a "Feature on Demand" model. Instead of storing feature files directly in the WinSxS folder (saving disk space), the server is designed to fetch required binaries from Windows Update. :If you have the
If you lack access to the original installation media, you can force Windows Server to fetch the fresh on-demand package directly from Microsoft's public servers instead of your local update infrastructure. Open the by running gpedit.msc .
If you run into any trouble, double-check the file path and file integrity. If you are still encountering issues, share any error messages you're seeing, and the community can help you out.
: Open the local Group Policy Editor ( gpedit.msc ). Navigate to Computer Configuration > Administrative Templates > System . Double-click "Specify settings for optional component installation and component repair" . Set it to Enabled and check the box to "Contact Windows Update directly to download repair content instead of Windows Server Update Services (WSUS)" . Run gpupdate /force and retry the installation. In Server 2012 R2, Microsoft introduced a "Feature
Install-WindowsFeature -Name NET-Framework-Core -Source "C:\sxs\" Use code with caution.
Locate the file named microsoft-windows-netfx3-ondemand-package~31bf3856ad364e35~amd64~~.cab .
PowerShell provides a more modern command-line alternative. Open the by running gpedit
Before diving into downloads, let's decode the file name:
This is the "offline" method and does not require an internet connection.
Open or Command Prompt as Administrator.
Computer Configuration > Administrative Templates > System
Use a CAB copied to a share (example): DISM /Online /Add-Package /PackagePath:\fileserver\packages\Microsoft-Windows-NetFx3-OnDemand-Package.cab