Hi,
I recently had to reinstall windows all over again because my computer broke down and when I checked the device manager recently it had a yellow questionmark next to multimedia audio controller and my friend told me that I need a sound driver for my computer but I can't seem to find the right one. Help me >o<

Check your machines manufactures web site as they are readily available online.
The MAKE of your machine is extremely important as we can't help without it.