Solving Installation Problems with .NET 3.5 on Windows Server 2012 R2

If you're trying to install .NET 3.5 on Windows Server 2012 R2, you're probably going to run into an installation issue. The easiest way to solve this is to ensure you have Windows installation media available and use the command below rather than the add/remove features GUI or standalone .NET installer.

dism /online /enable-feature /featurename:NetFX3 /all /Source:w:\sources\sxs /LimitAccess

replace the drive letter "w" with your windows installation media path.

HOW TO: Setup IIS Web Server in Windows Server 2012 Using PowerShell

If you're looking to create an unattended installation scenario for an IIS Web Server one approach would be to script your installation using PowerShell. This article describes the installation steps for IIS on Windows Server 2012. With these steps you can assemble a script for the provisioning of your application use case.