Force Windows feature .net 3.5 install

Occationally I come across Windows installations that refuse to activate the .net 3.5 feature.

There could be various reasons preventing this, one could be WSUS.

A simple workaround is to download the ISO for the running Windows version (winver)

Mount this and run the following from an elevated cmd

Dism /online /enable-feature /featurename:NetFx3 /All /Source:e:\sources\sxs /LimitAccess

Should sort this issue

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