imaging devices-webcam

I uninstalled my webcam software and driver sometime back and now want to use my webcam.

when i go to device manager there is no imaging devices tab where the webcam should be, i have tries installing dell webcam central but because the driver is missing there is no webcam detected.

I run a Inspiron 15 n5050, i have tried using the dell download center but i dont seem to be able to register.