My webcam stopped working all of a sudden. i used

Webcams are flaky, esp when using yahoo. Off the top of my head, I dont recall if your pc has a built in internal cam. A good thing to try is simply rebooting the PC and restarting the webcam. If that doesnt help, check the cam manufacturers site to see if the driver needs to be updated. Lastly, it might not be the cam after all. It could be the program that's using the cam, such as yahoo or MSN or whoever. Restart the machine first (thats likely gonna fix it), but if it still fails, try using the windows camera scanner option to snap a pic. If you can snap a pic, the hardware is ok, and you have a software issue. If however you try all of these things and still have failure, then you could have a bad USB cord (external cam) or a bad camera cable (internal built in cam). If you are under warranty, call Dell to have a tec sent out to replace your internal cam.