When i use my microphone, i can only have one program that uses a microphone. for example if i use a program like ventrilo/rogerwilco/teamspeak, then i open a game like counter-strike were it has a ingame microphone, or open another instance of ventrilo it will give me a error on the 2nd program and says failed to open sound device. I reformatted and it worked before i reformatted were i could use my microphone in multiple instances. I tried unistalling my c-media driver, then using my sound card driver that came w/ the cd, and then tried default windows driver again, nothing helped.
