Cannot add features to an Azure 2012 R2 VM

Question

I am trying to install .Net 3.5 through Roles & Features. The message appears:

Do you need to specify an alternate source path? One or more installation selections are missing source files on the destination server. The server will try to get missing source files from Windows Update, or from a location that is specified by Group Policy. You can also click the “Specify an alternate source path” link on this page to provide a valid location for the source files.

I selected Install and it failed complaining it could not find the files.

The VM is "Windows Server 2012 R2 Datacenter" from the Gallery

Where are the source files? Have I missed something obvious?

Answer 1

This is a known issue. Evidently a recent security update prevents .Net 3.5 being installed. The fix is to use Windows Update to add more recent patches.

Answer seen at https://superuser.com/questions/789193/how-do-i-enable-the-net-framework-3-5-on-an-azure-vm-created-from-a-windows-ser

Thanks Jeff (https://superuser.com/users/1071/jeff-moser)