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 but it says it's not signed and will not accept install it anyway. I tried every permission I could think of to no avail. The mic works fine on my XP SP2 computer but not on the Vista one. Any ideas?

Have you enabled it in the sound properties? I think its off by default.

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