You have a wav file in your scene? Thats unusual, I'm, not surprised your PC is being funny. I've never tried it. What most people tend to do is render off the animation and then add sound in a compositing programme like premier, if you just want some sound with your animation that'll work just fine

. I've never come across a situation where I needed sound in my scene, if you're after something else could you describe the scene a bit more for us

?