INTRODUCTION

The Microsoft .NET Framework 3.5 is still a common prerequisite for applications and is therefore required to be installed. This post is a guide for how to install .NET Framework 3.5 on Windows Server 2012, Windows Server 2016 and Windows 10.

This blog post describes how to install .NET Framework using:

  1. Command line
  2. Server Manager (GUI)
  3. Offline Installer

Unfortunately, installing the Feature is not as straight forward as you might think. Microsoft has a guide for it, but it does not provide the full story.

If you are trying to install .NET Framework 3.5 from Server Manager or from Programs and Features, you will see this when installing the feature:

“Do you want to specify an alternate source path? One or more installation selections are missing source files…”

Bug when adding .net framework 3.5 in Server 2012

SOLUTION

To solve this, you can either:

1. Go to a command prompt and enter this:

Note: Source should be the Windows installation disc. In my case, this was located on D:

Bug when adding .net framework 3.5 in Server 2012

2. Go down to Specify an alternate source path and enter <media drive>:\sources\sxs as the path.

Specify alternate source path windows server 2012 .net framework 3.5
Specify alternate source path windows server 2012 .net framework 3.5

3. Install using the Offline Installer: https://www.microsoft.com/en-us/download/confirmation.aspx?id=25150

Now you should see this under your Features list:

.NET Framework 3.5 feature installed on Windows Server 2012

REFERENCES

https://docs.microsoft.com/en-us/dotnet/framework/install/dotnet-35-windows-10

Sponsored Tech Tip : Install your .NET framework on high performance virtual dedicated server such as Windows Server to monitor/access it remotely from anywhere, anytime on any device(PC/Mac/android/iOS) with desktop hosting service from www.CloudDesktopOnline.com. If you prefer a server, Rent a Hyper-V dedicated virtual server at an affordable pricing and 24*7*365 days live tech-support from one of the leading DaaS providers – Apps4Rent.