You need to tell us what exactly is failing and which steps you took. As far as I'm aware, I'm not in your house and looking at your pc ;-)
4bis. You'll also need to tell us which version of MuseScore you are using and on which operating system (Windows/Mac/*nix?)
As a possible workaround, does exporting to PDF work? Then try printing that PDF using your default PDF viewer.
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You need to go to File → Print…
You need to tell us what exactly is failing and which steps you took. As far as I'm aware, I'm not in your house and looking at your pc ;-)
4bis. You'll also need to tell us which version of MuseScore you are using and on which operating system (Windows/Mac/*nix?)
As a possible workaround, does exporting to PDF work? Then try printing that PDF using your default PDF viewer.