My name is Harish and I work for the Social Media and Community Team at Dell. The Drivers are present on the Webcam Resource CD sent along with your monitor, Dell Webcam center is a part of the same program.
Best to do is go into Control Panel, System, Devise Manager. Fing the USB and Camera. Delete both. Then at the top left on menu there is a option for scan new hardware. It should install the camera and relationship to usb new with out the old config lingering.
Go to support.dell.com. Enter the express service code from the sticker on the computer. It will take you to a page that has all the drivers for your specific computer. Download the webcam driver. Run the install (usually it will run automatically for you as soon as the download completes.) Done.