How do you protect songs on your windows media player?

Question

make it so that you have to have a password to reach a certain playlist?

Answer 1

I don't know whether that functionality is available but you can definitely copy protect your music by encoding them in Protected Windows Media Audio format which prevents the music from being played on unauthorized computers and devices.

You can select this option by going into "Options" and then changing the settings under "Rip Music" tab.