.NET Framework 3.5, Windows 8.1 and WSUS

What a disaster – you’d think that a simple install of the .NET Framework 3.5 would be no problem for a site using WSUS.  Instead, I’ve spent hours troubleshooting cryptic error codes, only to discover these articles:



“For Windows 8 and Windows Server 2012, WSUS is not supported as a source for feature installation (for example, adding .NET Framework 3.5 feature files) or feature file store repair operations.”

Are you kidding me?  Windows doesn’t even gracefully tell you this – I just started getting error 800f081f

Instead, they recommend using the DISM tool and installing from the source DVD.  The problem with that is that we have a Windows 8 source DVD, not Windows 8.1, since it upgraded itself from Windows Update.

I was skeptical, but I found a link on this forum to a standalone installer that somebody put together, since apparently Microsoft couldn’t be bothered to.  After many hours of headaches over this problem, I had it solved in about 15 minutes!  I’ll share the link in hopes that it can save somebody else the same pain.


Here’s the link to the executable, in case the forum goes away:


UPDATE: This also works on Windows Server 2012 and 2012 R2

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