Click messenger top left, scroll down and click preferences then scroll down and click webcam where you can make adjustments, click o.k. To make sure it is o.k. click messenger top left, scroll down and click my webcam. and your webcam should come on. You should also run your call setup. Click actions top row of the messenger window scroll down click call setup and follow the prompts. When you are chatting with someone click on webcam in the chat window. I hope that is of some help. My own opinion is that if you are going to be web camming regularly download windows live messenger to me it is far better than Yahoo messenger.