Offline install of .NET Framework 3.5

This old version of .NET is often required to be installed prior to installing some piece of software or other. I’ve found that even if I download the installation file from microsoft.com, it still requires an internet connection during the installation, which isn’t always available (e.g. if I’m installing in a non-internet connected lab environment).

The framework is on the Windows 10 media, so you can install it from there by running the following command from a command line (as administrator):

dism /online /enable-feature /featurename:NetFx3 /All /Source:F:\sources\sxs /LimitAccess

Where source is the location of the sxs sub-directory on your attached Windows 10 media (in the case above, mounted to the F: drive).

This will install the framework.

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