Please download the software needed for the webcam from the following weblink:
http://ftp.hp.com/pub/softpaq/sp61001-61500/sp61279.exe
If the issue persists, refer the following weblink for troubleshooting the issue:
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c02452221&cc=us&dlc=en&lc=en