You should say what operating system you have. The web cam will start when you start an app that uses it like Live Messenger, Skype, video calls, etc. If you have Windows 7 you can go to Devices and Printers to test. Double click on it to start it. There is a Help button that has more info.
I have windows 7. I went to devices and printers, but it does not show up. I went to devise manager, and it says it is working properly. I tried the help button, but maybe i'm not asking the correct question. i've used it before, and i thought there was just some quick key i could push. Thanks.