I have a Windows 2012 Server which needs .NET 3.5 installed. For background info/solutions, please see this: http://sqlblog.com/blogs/sergio_govoni/archive/2013/07/13/how-to-install-netfx3-on-windows-server-2012-required-by-sql-server-2012.aspx

I have tried this but it doesn't work for me. Here is what I am trying: Using a Windows 2012 ISO file, 'mount' on the 2012 Server as 'D' drive and then tried both GUI and Command prompt. In case of GUI, I specified the 'alternate source' path to the D drive's 'source/sxs folder but that failed without giving enough info.

In case of the command prompt, here is what's happening:

dism /online /enable-feature /featurename:NetFx3  /source:d:\sources\sxs

I get error: Installed but Parent feature not enabled. So I tried another approached:

dism /online /enable-feature /featurename:NetFx3  /all /source:d:\sources\sxs

the above command, per http://blogs.technet.com/b/askcore/archive/2012/05/14/windows-8-and-net-framework-3-5.aspx is supposed to enable parent elements; but running this I get error like 'source not found'.

Is there some error in my second command? What else I could do?

This is Windows 2012 Server Standard edition.

Thanks!