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I download a big file of .Net 3.5 SP1 from http://download.microsoft.com/download/2/0/e/20e90413-712f-438c-988e-fdaa79a8ac3d/dotnetfx35.exe

Now when I try to install it on Windows Server 2012, I get the following screenshot:

enter image description here

What the?? When will the microsoft learn?

Now this is a loop. When I try to install from Server Manager, I get installation cannot be done. It needs installation disk.

Does that mean I can't install at all without the installation disk in presence?

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2 Answers 2

Not 100% sure about Win2k12, but on 2k8 it's .net framework is available under server features.

Run Server management, go to Features, and .net 3.5 is right there.

I bet that's why it's failing.

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Didn't work. The actual answer is: stackoverflow.com/questions/14192244/… –  Tim Tom Jan 7 '13 at 9:54

Use this method:

In an elevated Windows PowerShell command window, run the following command:

Install-WindowsFeature –name NET-Framework-Core –source <drive>:\sources\sxs 

Note In this command, is a placeholder for the drive letter for the DVD drive or for the Windows installation media. For example, you run the following command:

Install-WindowsFeature –name NET-Framework-Core –source D:\sources\sxs

Source

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