.NET Framework 3.5 Installation fails when using Add/Remove Windows Features on Windows 8

OK, people make mistakes :) Out of the box installations of Windows Server 2012 and Windows 8 might fail to install the .net 3.5 Feature as it appears it cant be downloaded and is not locally cached after the installation.

To sort this out, insert or mount your Windows Installation DVD and execute the following command (change the Drive Letter to match your Installation Media) on an elevated Command Prompt:

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


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