I understand your problem with the Webcam.
It appears the driver may be missing or corrupted.
Click on "Control Panel", then "DeviceManager", you will then see a list on all the devices on your computer. Look for the webcam, it may be listed with one of the listed items such as USB, double click to make sure it listed. When you find it, uninstall it and then reboot your computer.
After bootup, the webcam will be detected and Vista will go out and search for drivers.
I am also suppling a link below to HP, for your model laptop, for drivers that may be needed.
http://h10025.www1.hp.com/ewfrf/wc/softwareCategory?os=2093&lc=en&cc=us&dlc=en&sw_lang=&product=3224052#N778
Good Luck
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