The system doesn't seem to be able to see the mic. However it works perfectly fine in my Ubuntu installation (I have dual boot). It also used to work fine in Windows 7 before.
The motherboard is:
I'm using an A4Tech HS-100 headset (with Realtek drivers, as otherwise it doesn't work at all) and plugging it into the front panel.
In Recording Devices the mic is marked as
Not plugged in:
and there are no Input devices or something similar in Realtek HD Audio Manager:
All the drivers that I found on the motherboard vendor's CD are installed too.
What else could be missing?