Hi Sharon1234,
I see that you need your webcam drivers. I will be happy to assist but I will need more information then what you provided to help. Did you do a full reformat or a system recovery? Did you reinstall the same operating system? What is your operating system? What is your product number?
Find your product number on a desktop:
http://h10025.www1.hp.com/ewfrf/wc/document?cc=us&lc=en&dlc=en&docname=bph07555
Find your product number on a notebook:
http://h10025.www1.hp.com/ewfrf/wc/document?cc=us&lc=en&dlc=en&docname=c00033108
Finding your OS:
http://windows.microsoft.com/en-CA/windows/which-operating-system
Thank you,