How do I get the sound to work in windows 7? -

I installed it on a macbook with bootcamp.

Dumb answer but are your speakers on. Or maybe your wires are crossed.

1. Did you check if the Sound Drivers are installed properly. 2. Check if the speakers are connected properly if they are external speakers 3. If above two are good, then open the volume control and see if the speakers are not muted.