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I am setting up a new 2008 SQL server on Windows 2008 R2 and it requires .NET framework 3.5. Unfortunately when I go to Features in the server manager, it only lists 3.0 and it is already installed. Our WSUS has all required and security updates enabled.

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up vote 1 down vote accepted

So, download it from Microsoft... ? You don't see it in your WSUS because it's neither required nor a security update, I'll wildly guess.

Although, this is odd. Wikipedia tells me that 3.5 is the default in 2008 R2. Are you sure you've got R2?

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I don't think there is a Disk 2 for 2008 R2, you're thinking 2003 R2. For 2008 R2 .Net 3.5 is there, you need to add the feature using the server manager. – Coding Gorilla Mar 23 '12 at 19:43
I have just been doing 2003 R2 installs, you're entirely correct that 2008 R2 is a single DVD image. My bad. – mfinni Mar 23 '12 at 19:52
But as Brian says, he's in Server Manager looking at Features, so I'm not sure what he's missing. – mfinni Mar 23 '12 at 19:53
Yea, I think you're right, I think he's actually got 2008, not R2. – Coding Gorilla Mar 23 '12 at 19:54
No, its definitely 2008 R2. I ended up doing what mfinni suggested and downloaded manually from Microsoft instead of enabling it locally on our WSUS – Brian Mar 26 '12 at 19:02

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