My webcam on my Notebook

Question

My webcam on my Notebook PC (HP Pavilion tx 1308) does not work with my quickplay, does not work when I'm chatting on line with skype or yahoo messenger. Works well when just tested with Windows Live Messenger. It has been replaced on the device manager menu by USB 2.0 Camera. I am not able to re-instate the inbuilt webcam on the device manager.