Enable .Net Framework 3.5 SP1 on Windows Server 2012

Add .Net Framework 3.5 SP 1 to Windows Server

The .Net Framework feature 3.5 is not installed with Windows 2012 or Windows server 2012 R2 operating systems. Some applications require Framework 3.5 installed as a prerequisite. such as VMware vCenter 5.5.  Some application installers will install the feature during the installation of the application. You can however install the .Net Framework Feature manually. The option to install it as a feature feature is grayed out. The grayed option to install .Net Framework feature is bewildering because it is listed to be installed but not available and Grayed out.

 Enable .Net Framework 3.5 SP1 on Windows Server 2012 R2

I used the following instructions and the screen shots were from the actual installation of .Net Framework feature on Windows 2012 R2.

 The option to install .NET Framework 35 on Windows 2012 and Windows Server 2012 R2 server is grayed out.

Enable .Net Framework 3.5 SP1 on Windows Server 2012

Enable .Net Framework 3.5 SP1 on Windows Server 2012

To install .NET Framework on widows Server 2012, for example as a pre-requisite for VMware vCenter 5 and VMware vCenter 5.5, run the following command to install .NET Framework 3.5 SP1. it will install .NET Framework 3.5 SP1 on Windows 2012 server when the option to do so from the features and Roles server management snap-in is grayed out.

Follow these steps to enable .Net Framework 3.5 SP1 in Windows Server 2012 , they worked for me when installing .NET Framework as a pre-requisite to vCenter 5.5 U2.

1. Open a Command Prompt window with Administrator Privileges

2. type: dism /online /enable-feature /all /featurename:netfx3 /source:d:sources\sxs /limitaccess

Change the “d” in the command to match the drive letter of your DVD/CD drive os the virtual drive that has the Windows Server 2012 DVD ISO mounted.


About pctechgo
Work in technology field, touch many types of technologies from Exchange servers, to Citrix XenApp, virtualization like vmware, xenserver, MS hyper-V. Install servers, server apps, blackberry servers, networking hardware like Cisco switches routers, ASA firewalls, Sonicwall firewalls, and of course all levels of Microsoft from AD, DNS, to even desktops.

One Response to Enable .Net Framework 3.5 SP1 on Windows Server 2012

  1. GTEK090 says:

    I can totally understand why frame 4.0 is available for installation on Server as a feature . The version of framework released and tested with the server is the one that is on the media for installation directly from the feature installation UI. It is interesting however that version 3.5 of framework is also an option for installation but it is not automatically available during the normal add feature installation UI. Instead, we have to direct the installer to look for framework 3.5 by providing the path the source files.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

%d bloggers like this: