.NET Framework 3.5 Feature Installation Fails - Source Files Could Not Be Found
Installing .NET Framework 3.5 Feature (via Roles and Features Wizard) on Windows Server 2012 fails with error:
Installation of one or more roles, role services, or features failed.
The source files could not be found. Try installing the roles, role services, or features again in a new Add Roles and Features Wizard session, and on the Confirmation page of the wizard, click "Specify an alternate source path" to specify a valid location of the source files that are required for the installation. The location must be accessible by the computer account of the destination server.