Installing the .Net3.5 framework on Windows 2012 R2
Before you can install SQL Server2014, you need to make sure that you have the correct .net framework installed on your Windows server. If you try and install sql server without it the installation fails before it even starts with the following error.
In order to fix this you must install the .net frame work as demonstrated in the following section. When I first tried the install I got a few errors, which I will outline so you may avoid if you ever need to to do this.
Firstly once you have downloaded the .net3.5 frame which you can download from this link .net35 Framework, you cannot just merely click on the exe and install it. You have to open up Server Manager and choose add role or features shown below.
Click next in the Add Roles and Features Wizard
We are going to be adding a feature so select the Role-based or feature-based installation button
Next we just select our server to which we will be applying the feature
Below we are now at the Server Roles section. We are not adding anything in this section so just click next.
Now we add the required feature – select the .NET Framework 3.5 Features. Once selected click next.
Now we need to specify a location of the file we downloaded earlier. Click on the link ‘Specify an alternative source path’ shown below.
I placed the install file in the directory highlighted below
Now click on the install button. If you have done all the windows updates as previously mentioned the install will be successful. If not you may get an error
As mentioned, if all the updates haven’t been installed the installation will fail.