Sir, I'm just newly employed, my boss ask me to test the audio but it doesn't work, I thought it's just because the system is muted. But when I tried to fix the volume an error pop-up says that "there is no mixer devices available" I look at the computer of my co-worker because her audio is working and I checked out the drivers, it has NVIDIA Network Bus Enumerator but mine don't have it, ,, What I should do? Do i need to install it too? I am using Windows XP 2003 32 bit. Thank you in advance.