I have a microsoft lifecam nx 3000. When i first joined i was able to take my profile picture with the camera and i still can. And when i go to test the camera works perfectly. However, the only thing it cant do is when i joined video calls it just shows my picture and say camera not detected. I dont think there is any other application using the camera, but i can never know for sure. Is there any other problem or way to check if other programs are using it?