To install .NET Framework 3.5 (identified by the package name
Press . DISM will proceed with the installation and should complete successfully within a few minutes.
The microsoft-windows-netfx3-ondemand-package.cab is a Windows Cabinet file containing the full payload needed to install .NET Framework 3.5. On Windows Server 2012 R2, this file is located within the ISO image of the installation media. microsoft-windows-netfx3-ondemand-package.cab Source: Windows Server 2012 R2 installation media (ISO)
If you are trying to install specialized .NET features, you may need to explicitly specify them in the command. 6. Verifying the Installation To install
Once the command completes successfully, the installation is done! It's always good practice to restart your server to ensure all components are fully registered and the change is properly applied.
The most reliable way to install this package is via PowerShell or Command Prompt using the Dism tool. Method: PowerShell Open as Administrator.
Open or Command Prompt as Administrator. On Windows Server 2012 R2, this file is
Mount the Windows Server 2012 R2 ISO file onto your server or insert the physical media.
This is a user-friendly option for administrators who prefer a graphical interface.
Locate the file named .
The definitive workaround requires utilizing the native deployment package: . This guide provides comprehensive, step-by-step methods to acquire, download, and manually force install this package on Windows Server 2012 R2. Understanding the Problem: Why Does .NET 3.5 Fail?
If your organization has a volume licensing agreement, VLSC is the gold standard.
