Tried to install Microsoft SQL Server 2012 on a Windows 2012 R2 and had the following error:-
The following error has occurred:
Error while enabling Windows feature : NetFx3, Error Code : -2146498298 , Please try enabling Windows feature : NetFx3 from Windows management tools and then run setup again. For more information on how to enable Windows features , see http://go.microsoft.com/fwlink/?linkid=227143
OK simple enough I thought, so I just used PowerShell and ran:-
Install-WindowsFeature –name NET-Framework-Core
but that got to about 68% and failed. OK maybe it needed the media (DVD/ISO) of the original VM creation. So again tried the following PowerShell:-
Install-WindowsFeature –name NET-Framework-Core –source Z:\Sources\SXS
but again got to about 68% and failed - very odd as never had issues installing .Net 3.5 before on a modern server. Looking around the internet it seemed if you had any of the following KB's installed from the Windows update it was a good idea to remove first:-
- KB2966826
- KB2966827
- KB2966828
But I didn't have these installed as a fairly new server build.
FIX:-
The fix was fairly simple. On the Server open Group Policy and open the following:- Local Computer Policy -> Computer Configuration -> Administrative Templates -> System
Find the Setting that says:-
Specify settings for optional component installation and component repair
Click Enabled and tick the box that says:-
Download repair content and optional features directly from Windows Update instead of Windows Server Update Services (WSUS)
Click apply and OK, then back in PowerShell run:-
Install-WindowsFeature –name NET-Framework-Core
And thankfully .Net 3.5 will now be installed.