Sorry you're having trouble installing Songsmith. A few questions:
Can you confirm that the .msi you've downloaded is called "SongsmithSetup.1.03.msi"?
Can you confirm that this error is happening during installation?
Can you confirm that the reason you installed the Media Feature Pack is because you're running Windows 10N? Have you rebooted since installing the Media Feature Pack?
When the error comes up, is there any more information that comes up with it? For example, we had an issue with previous versions of Songsmith on certain versions of Windows that would produce "Error 1001: WMA files could not be extracted".
That would help us narrow it down to a particular piece of the installation.
Thanks!
-Dan