Windows 10 midi's don't play

I have windows 10, and for some reason I can't play midis. Everytime I want to play a midi, it says "Windows Media Player cannot play the file because there is a problem with your sound device. There might not be a sound device installed on your computer, it might be in use by another program, or it might not be functioning properly."
I've looked for a solution, but I can't seem to get a straight answer.