I had the Vista HD Audio driver installed and updated to IDT as it is an Intel motherboard. There is not a very good manager with IDT but it says it is connected. I tried front and back jacks and every combination available. The mic does not work. I tried installing Realtek AC97 for Vista...
ac97
audio drivers
audio management
compatibility
drivers
hardware
home premium
idt
installation
intel
jack
microphone
permissions
realtek
silentmic
sound
troubleshooting
user issues
windows vista