Go to the start menu. Select Dell Webcam. The select Dell Webcam Central. From there you can take pictures and videos.
Appeal you to follow these steps:
(1) Click on the camera icon available in the main screen or move the pointer to the top right corner and click search.
(2) Type webcam and hit enter.
(3) On the left side webcam application will be available select it.
Hope your problem will sort out.