HP does provide Windows 7 for:
» HP Pavilion dv6500 CTO Entertainment Notebook PC
» HP Pavilion dv6500ew Entertainment Notebook PC
» HP Pavilion dv6500z CTO Entertainment Notebook PC
Is yours one of these?
You only want to use drivers from your device's/computer's manufacturer.
Anything else will not be what you need.
Your only other option is to buy a external webcam that has a Windows 7 driver.