How can I get my microphone to work on Windows 7 and Boot Camp 2.0?
Are you sure you have all the bootcamp drivers installed on the PC side of things?

Also, what type of microphone is it? Are there updated drivers for it?

Is Windows even recognizing a device is attached? Can you choose it and tell it to find the newest drivers?

EDIT:

Go to ControlPanel > SoundAndAudioDevices and click the 'Voice' tab. Make sure the 'Voice recording' device is correctly selected and click the 'Test hardware' button. You should be able to adjust the record volume. (One possible extra step: have to go to "advanced" and check-mark a box for "boost mic.")


  I then determined to try the microphone with headphones on. Sound comes through crystal clear to other people with them on. I don't understand why, but just know that it works fine now. So try some headphones for a temporary fix.


If none of this works for you, it seems that there is no fix for this issue yet and it will have to take another update to the Windows Bootcamp drivers for this issue to be resolved.